THE 3 *** 3 * # <^*<^ * PHOTOGRAPHIG PRIMER^sg^ E J O^KmiNGToN I J C-MILLEN M-D- Digitized by the Internet Archive in 2014 https://archive.org/details/photographicprimOOwort_0 O/r sz7 PHOTOGRAPHIC PRIMER THE Photographic Primer & OUnuaf of (practice BY J. C. WORTHINGTON & J. C. MILLEN, M.D. Qfittoerfon THE RIVERTON PRESS MDCCCXCVl COPYRIGHT 189% BY C. WOR THING TON AND J. C. MILLEN Printed and elect rotyped for the Riverton Press Riverton, N. J., by At. pleasant {printer? J. Horace McFarland Co. Harrisburg, Pa. PREFATORY NOTE PREFATORY NOTE This little manual, which now seeks audience, is not the mouthpiece of a manufacturer, neither have the authors a private axe to grind. It is written to give a clear, simple definition of photographic practice in its primary form, as the uninitiated must approach it. The Primer can lay no claim on the professional operator, and goes no further in the path of photographic work than the production of a perfect picture by the simplest processes. For those who wish to experiment with the endless procession of new plates, new papers, and new methods, there is abundant help ready to hand in the photographic literature of the past ten years ; but to one who knows nothing of the art, who has never looked into the mysterious simplicity of a camera box, and to whom a lens is but a bit of glass, the Primer may appeal with confidence. The authors have sought to give the cardinal points in photographic work in epitomic form, and in this respect the manual may be found not only a guide to the beginner, but a reference book of constant use to the more advanced student. CONTENTS -*> PART ' Sec. I. The Apparatus 15 Sec. II. The Dry-Plate 35 Sec. III. The Developer 42 PART II. Sec. I. The Exposure 53 Skc. II. The Development 68 Sec. III. The Printing 87 PART III. Sec. I. Mounting 135 Sec. II. Preservation 140 Sec. III. Enlarging 143 ADDENDUM. The Hand-Camera : Its Snares and Virtues 157 PART I Section I. THE APPARATUS. HE Camera, in its simplest form, is a box whose two ends can be made to approach one another at the will of the operator. In this simple shape one end is firmly secured to a frame at the bottom, the other end traveling to and fro, either in grooves or on a notched metal track, guided and con- trolled by a pair of toothed wheels. As the space between the two ends is required to vary for every different picture, a flexible case or bellows unites them, the bellows making the box dust-tight and light-tight. One end of the box carries a panel with a rabbeted edge, secured by a button. The panel can be removed by turning the button and slip- ping the panel out of the rabbete. This same end of the box, with its panel entire, slides up and down between two side posts, so that it may be raised from one to three inches, and as the case or bellows is secured to the back of this sliding front, it always follows the (15) i6 The Photographic movement of it. The panel of the sliding front has a circular hole cut in it. The fixed, or opposite end of the box, is made with a door the entire size of the end. The door is really a narrow frame, with a piece of fine ground glass set in it, and the door or ground glass frame opens in different ways in different makes of cameras. In some it is hinged ; in others there is a side sliding movement, by which the ground glass is sep- arated from the back of the box so that a space of about half an inch is opened, into which the plate-holder (to be described later on) may be slidden. The grooved or notched track-frame at the bottom, on which the front of the box travels, is usually hinged back of the center of its length, so that, when the ends are brought close together by the telescoping of the bel- lows, the longest part of this frame or bed may be folded up against the front of the box, making the whole camera compact for carrying ; the folding up has nothing to do with the operation of the camera. Roughly speaking, this is the whole of a camera box, except two other features of its construction, which will be noted further on. The lens entire is a piece of brass tube, called the mounting, carrying the actual lens or optical glass which condenses and projects Primer: The Apparatus, 17 the picture. The tube screws into a brass plate, which is firmly secured to the sliding front of the camera by small screws. On the front of the tube is placed a small cap of leather, like the lid of a pill box. A single lens has one glass or lens ; a double lens two glasses, the lens being held between two thin rings which screw together in the tube, form- ing a round frame or support. The position of the lens in the tube varies according to the character of the lens. In front of the single- lens glass, and between the glasses of the double lens, thin metal disks, with holes of varying sizes, may be inserted ; or in some lenses the holes are all on one disk, the disk revolving on a center, bringing either hole of the series in turn before the exact center of the lens glass, at the will of the operator. These disks, in whatever form they work, are called stops or diaphragms. The glass or lens has many forms, varying for special purposes, and it may be here said that these variations are real and essential, and that in the manufacture of lenses there is little opportunity to create useless forms or to produce an article simply to sell, for the lens is under the dominion of strict optical laws. In some lenses the section — /. e., if cut through the center of its thickness — shows flat on one side and convex on the other ; in i8 The Photographic others there are two convex sides, while an- other variety is slightly concave on one side and convex on the other. But the beginner had best not lose himself in the mazes of lens lore. The object of the lens is to gather the pic- ture or view towards which it is directed, and cast the condensed image upon the piece of ground glass in the door at the back of the camera or box. The nearer the subject is to the front of the lens, the greater the distance between the lens and the ground glass, and vice versa. It is for this reason that the two ends of the camera must be made to approach one another or to recede at will. At almost any distance from one another some sort of blurred image will be seen on the ground glass, but there is a right point, at which the image is presented sharp and clear in all its parts, and the movable end must be operated backward or forward until this clear, clean- cut picture is seen on the ground glass. When this condition is arrived at definition is secured. A good lens should always make every part of the picture clear on the ground glass, not only in the center, but at the extreme corners ; it must not distort or twist the square lines of any object which it casts upon the ground glass, and it must be of a focal length adapted to the extension of the bellows of the camera. Primer: The Apparatus. 19 Focal length means simply this, that when the image on the ground glass is perfect, some lenses require greater distance than others between the front and back of the camera to produce the same image at the same distance from the lens, so that a camera which could only be extended eight inches would not be adapted to a lens whose focal length was twelve inches. The lens, as has been said, gathers the pic- ture and reduces it to the size of the piece of ground glass, presenting it before the eyes of the operator in the same brilliant, colored form as on the table of a camera obscura. Every object within the compass of the lens is shown faithfully ; if it is moving, we see it moving on the plate ; if it is at rest, so it is shown in the miniature picture. Shift the camera but a quarter of an inch, and a new section of view is presented, so that to secure the image of one group of objects the box or camera must be held rigidly to one spot. But the camera must needs be moved to many places in order to be generally useful, and a temporary but temporarily permanent rest for it is required, a support that can be easily car- ried. Three sticks held the cooking pot of the earliest settler in the wilderness, and three sticks, or the tripod, do duty with the cam- era. There are about ten thousand kinds of 20 The Photographic tripods, and some of them have virtues. Three sticks, jointed to a plate at the top, and with the bottom ends of the stick pointed, so that each will hold in the ground when spread, constitute the simplest form. But, as in the instance of the camera box, which it would be inconvenient to carry outspread, so a parcel of sticks five feet long would be in the road when moving from one place to another. The folding or sliding principle is, for this reason, applied to the tripod, and some of them are made so that each individual stick slides into itself twice or thrice, or is hinged at the middle and folds over, reducing the long-legged support to a small bundle. In most of the tripods the head can be detached and carried separately; in some of the cheaper forms it remains permanently fixed to the group of legs, and in others the camera base has the tripod set into it as a part of the cam- era itself. Where the camera and tripod head are separate, the head is attached by a screw or clamp, and the best cameras have a turn-table head, so that the camera box can be revolved at will as upon a pivot, and yet remain rigid at any point. By spreading or gathering the legs, or by sliding the telesco- ping legs, the height of the camera can be altered to suit the operator's purpose. There are but few things to be said about a Primer: The Apparatus. 21 tripod, and they might as well be set down here entire. It must not be shaky, or so lightly made as to be easily broken. Conve- nience in carrying is frequently gained at a sacrifice of these great virtues, and the after result is generally profanity and bad pictures. When you are shown a tripod in a store, see that it stands well ; put your hand on the top, with the legs spread, and try to oscillate it. If it is in any way shackly don't have it ; take a heavier one, or one with less joints, and see that all these joints operate easily and are held firmly. A tripod in which you can shorten any one leg at will, is generally found most serviceable. Examine also the method of attaching the camera box ; it ought to be done quickly, and when done it should hold rigidly and firmly, nor should these combined virtues prevent the easy detachment after you are through with it. Using reasonable care on these points, any fool ought to be able to select a good tripod. With the camera box mounted on the tri- pod, a lens in its place on the front board, and pointed towards some pleasant outlook, take the cap off the lens and try the move- ment of the camera front, shifting it back- ward or forward to bring the picture clear on the ground glass. You at once experience a difficulty; you can see nothing on the 22 The Photographic ground glass ! The light of the day on the back of the glass prevents the reflected image from being seen. Your head and the glass must be shut in companionable darkness, and the best way to accomplish this, and see the picture, is to throw a cloth over the end of the camera box and draw it closely in around your face, so that the " garish day" is shut out, meanwhile looking at the ground glass, and not attempting to look through it. With the cloth over your head, the only bright ob- ject for you is the picture on the glass, and if you will remember the injunction just given, you will have no difficulty in seeing it, and must not be disturbed, when you do finally see the picture clearly, to find it upside down. A half dozen experiments will reconcile you even to this, without standing on your head or trying to see it in any other way than frankly upside down, and the humblest adorer of beauty must enjoy the miniature picture even under such apparent disadvantage. While your eyes are coming back to their natural feeling in daylight, it might be well to think about the covering you have over your head. The profession call it a focusing cloth, and a square yard of rubber cloth (like a piece of a waterproof cloak), or a piece of black velvet, is generally used. The velvet is best ; it does not smother the opera- Primer: The Apparatus. 23 tor like the rubber cloth, for it lets some air through, and when the wind blows it is not so much like a sail. It is pleasanter to the face when it touches it, clings closer to the camera and the head, and packs in with your camera much better than the more unyielding rubber cloth. Use a plain, every-day focus- ing cloth like this until you know more, and don't experiment with substitutes until you have used some of your good money in mak- ing a few first-rate pictures. Put the cloth over your head again and look at the ground glass picture. Raise and lower the sliding board which holds your lens ; swing your camera box on the tripod head so that it takes in a different picture ; move your camera front backward and forward on its bed, and get the knack of doing this evenly and slowly while your head is covered. To be able to get the picture that you think you want (you will not learn what you really want for a month or two) clear and sharp on the ground glass, and to be sure that it is sharp and clear, is enough for several experi- ments, without thinking of ' * taking a picture. " The back of the camera box has been de- scribed as having a door or frame with ground glass in it, and it has been noted that this ground glass frame is either hinged or has a side movement which will allow of the intro- 24 The Photographic duction of the plate-holder. This important feature in photography consists of a light wood frame of which a section looks some- thing like this: A deeply recessed groove on each out- fK«? er edge of the frame re- ceives a thin slide of wood fiber or compressed paper, and a central division of the same ma- terial separates the case into two distinct, shallow panels. At the other end the slides pass through the groove, which here cuts en- tirely through the frame, the end of these slides being made with wood ledges, which cover the slit through which the slides pass, so that when the slide is in no ray of light can enter the slit ; while when the slide is with- drawn a spring flap covered with felt closes the slit as the slide is drawn away. When the plate-holder has been placed in the space between the ground glass frame and the cam- era box (which it usually fits against in a rabbete), and the slide on the side next to the box removed, the shallow compartment on that side of the septum is in the complete seclu- sion and darkness of the interior of the cam- era box, granting that the lens tube is cov- ered by its cap. If a piece of glass were first placed in this shallow frame of the plate- holder, the face of it nearest the lens would be exactly in the position of the ground glass which we have slidden to one side or folded. Primer: The Apparatus. 25 When the holder is not in the camera, and the slide is closed or pushed in, the piece of glass is in a flat compartment, light-proof and dust-proof. As the piece of glass can occupy the same place as the ground glass, it follows that the picture cast on the latter would be cast on the glass when the slide is drawn, and it is thus that the image we have seen on the ground glass is cast upon the sensitive plate, which we will place in the holder later on. For the present we will ex- periment with a piece of glass of the size of the plates adapted to the camera — 3^ x 4^, 4x5, 5x7, or whatever it be. To put these pieces of innocent, plain glass in the plate- holder in broad daylight is simple enough. The slides are removed from both sides of the holder. At one end, the opposite from which the slide enters, a piece of flat brass bow- spring receives the end of the glass and allows it to be pushed down until the glass drops against the septum or middle division, and the opposite end is held under a little ledge, being thrown back there by the spring at the end first inserted. When this opera- tion is completed with both sides, and the slides are snugly pushed in, there are two pieces of glass resting in seclusion. All plate- holders do not have exactly the same arrange- ment for holding the glass, putting it in and 26 The Photographic removing it ; but every plate-holder ought to be simple enough to be easily handled in the dark. For after you have examined your holders well, and tried at putting the plain glass plates in them in the light, you will henceforth have to meet them only in the dull obscurity of the dark room, and for that mat- ter you will be well off if you learn to handle them while shut up in a dark closet, with all the lamps or lights in the house ex- tinguished and a dark night outside ! Deeds of darkness abound in careful photography, and any kind of light, save ruby or orange, has a skittish way of treating your plates, so that by all practicable handling in the dark you gain greater security. A good plate-holder has these virtues : It is as small as possible, and as light as possible consistent with reasonable strength ; it re- ceives a plate easily and comfortably, and yields it up as quietly by sense of touch ; while it ought not to be exposed in broad sun- light, it ought to be so tight that you could do so with impunity ; the slides should fit tightly and draw freely, and there ought to be some device to prevent Mr. Careless from pulling them out when they happen to be in a public position. Finally as to plate-holders just here, every slide of every plate-holder ought to have a record tablet of celluloid on Primer: The Apparatus. 27 the end from which it is drawn, and this tablet should be big enough to let you write in pencil, in modest size, the kind of plate, the date it was put in the holder, the subject, date and time of exposure, and the number of the stop or diaphragm used. All this amounts to but a few words, but such a record, which you can transfer to your house record if you wish to, but which at least tells you all about the plate and the holder until you want to develop the negative, is valuable, and saves the wastage on plates. Every man who has carried a camera has probably, at one time or another, filled his plate-holders with care, made a mental register of their contents, arranged them in his camera case in a certain order, and ten days afterward, having been prevented from using them, found that he was unable to tell whether No. 1 was slow or No. 2 fast — sometimes so badly off as not to know whether a plate had been used ! This record system is much more satisfac- tory than the usual note-book. Neatly printed and arranged note-books are for sale every- where, but who uses them ? They are un- practical unless the photographer be a man of immense resource in patience and care, for the note-book is but another impediment to action. Unless he ties it to his camera, it will generally be left in the dark-room, and if 28 The Photographic he wants to make a memorandum in the field, the photographer finds a card or envelope back his only resource. With the plate-holder tablet, the record and the plate are together until he reaches the place or time for devel- opment, and it can then be put into a per- manent note-book, if such a proceeding is desirable. The few items mentioned thus far consti- tute the entire equipment for an amateur, so far as mechanical apparatus goes, necessary to produce a negative. Everything except the tripod should stow compactly and neatly into a light canvas-covered case, and there are cases which hold the tripod as well. It is difficult to advise as to the selection of a camera. There are many good makes, and the scale of cost is applicable to almost every size pocket-book. The surest way to get a good article is to go to a maker whose wares are well established, and who gives no sign of quitting business. The wood of the box ought to be well seasoned and finished ; it ought to be put together so that strength and lightness are marked features, and the metal work well polished. The difference in a pound or two of lessened weight is marked when one has to carry the instrument for many miles, although it does not seem to be so essential while simply handling the article Primer: The Apparatus, 29 in the store. The bellows in the cheaper grade of cameras is often untrustworthy, and cracks and rots at an early day, so that surety as to its quality is an important consideration. For the amateur who does not know how far he will carry his photographic experiments, it is a safe course to buy a small camera at first. The main reasons are three : The expense is less, a good 4x5 camera is better than a me- dium 5x8, and the cost of plates, one of the greatest items in the pursuit, is restricted. If the student finds photography pleasing, he can at a later day exchange or sell his small camera and secure a larger one on fair terms (for the manufacturer!), and the experience he has already gained will make the selection of the second camera more satisfactory, for by that time he will know the kind of work he likes best, and the second choice can be made in the light of this knowledge. Again, the handling of large plates in development is a serious drawback to the beginner, and the possible misadventures with them can very soon lessen his enjoyment and his bank ac- count. Do not buy a " complete outfit!" Buy what you want ; or rather, what is made to do the kind of work you think you want to do. The articles can be selected separately, ac- cording to the list given at the end of this 3o 77?^ Photographic chapter. Your inclination will soon seek to make you add to it, and with care you can, of course, select many things which will be of advantage to you, but which are not spoken of here, but do not buy anything more than we recommend to commence with ; for the authors feel sure that the hour of gratitude for this advice will not be lacking. 5(C * ;fC * * * The apparatus for the indoor work is but a small affair. Trays for development are needed. Unquestionably the hard rubber are best, since they combine lightness, cleanli- ness and strength. You can let them fall with impunity, although there is no occasion for letting them fall at all. The trays should be of a size to receive two plates, not because you want to develop two at once, but for rea- sons shown later on. The trays are about an inch or so deep, and one corner should have a lip for pouring solutions from them. For measuring the solutions you ought to have two graduated glasses, one holding four ounces, fluid measure, and the other eight ounces. If you can get the graduates with the scale in white enamel they will be handier, and you will bless them in your dark room. For holding the solutions, a half dozen glass- stoppered bottles of from 5 to 20 ounces Primer: The Apparatus. 31 capacity are needful. These bottles may be empty cologne water bottles, or any bottles which have not been used for fluids which may have left some remnant behind. If you use old bottles, be careful about this, and as a precaution for even the cleanly cologne water bottles, wash them by filling with a moder- ately strong solution of citric acid, warm, al- lowing the solution to remain in the bottle for half an hour and briskly agitating it. The light to develop your pictures by in the dark-room is as serious a matter as your cam- era. Lamps for the purpose are sold — all kinds. They are mostly frauds. What you want is to get a good light of a deep orange- ruby tone, the strength of it being sufficient to see everything clearly in the dark-room. If your surroundings afford an opportunity to put an ordinary light, lamp or gas, in a room next to your dark-room, and you can have a 12x12 inch sheet of orange and ruby glass in a small aperture, otherwise light-tight, be- tween the two rooms, you will have as nearly an ideal condition as you can expect ; or if you develop in daylight, the 12x12 light can be in a screen used to entirely cover the out- side window, in which case it will be neces- sary to dim the strong daylight still further by putting a sheet of yellow " post-office " paper between the two glasses. But if you must 32 The Photographic use a lamp, be sure that the one you buy is light-tight, except where the light comes through the colored glass, and if it has an oil burner take it out as soon as you get homey using thereafter a good candle in its place. The developing room is almost always too warm, and you do not need a cook-stove in it; most of the lamps sold are cook-stoves, and in many of them the oil becomes so quickly overheated as to be really dangerous. There is one lamp made, we believe, in which the oil burner can be used ; it is a thoroughly good one, but Mr. Carbutt's price for it is in excess of what the tyro in photography should expend at the out- start, although not beyond its worth. The problem of light is made simple if one can command an incandescent electric bulb and stick it in his lantern. Two more pieces of furniture complete the apparatus : a drying rack for plates — a very simple wooden rack, in which each plate can have a groove to stand in, with one corner pointed downward, to drain and dry — and a printing-frame, to use hereafter when the time comes. Neither article has any particular points, and your purchase, so far as these go, can be made with blind confidence in the dealer. The list of necessities, then (outside of chemicals and a few minor trifles to be men- Primer: The Apparatus. 33 tioned), for all your work, from the field to the completed, mounted picture, is as follows : A Camera. (The Camera comprises the bellows-box affair which you have often seen in the windows. With it alone you cannot make pictures any more than you can with a clock-case. ) The Lens. (Comprising the mounting or tube, with the lens glass or glasses, the stops or diaphragms, the leather cap, and the base-plate to secure it to the Camera. There are many classes of lenses, and you can scarcely do all kinds of photography with one lens. But you do not want to do all kinds to commence with, and you can learn a little more about the matter in the chapter de- voted to Exposure. ) The Tripod. (About which enough has been said. ) The Plate-Holders. (Three double plate-holders — double means holding two plates — are sufficient for you now. The six plates which they will hold will be enough for you to spoil in one day. Plate-holders are like extra collars and cuffs : you can buy them when you want them, one or a dozen at a time.) The Focusing Cloth. (Don't forget to select a velvet or velveteen one ; a piece of velvet a yard square, from an old dress, or from any store, is all it means ; there is no magic in it. ) The Rubber Trays. (For developing. Three of these are necessary for the negative development and three for the print development. ) The Graduates. (If the base is broad and they sit well, the two glasses will be all right. ) The Bottles. 34 The Photographic Primer, The Lantern. The Drying-Rack. The Printing-Frame. Go to an honest store for these things, and neither seek to show the dealer that you are a master in photography or forget yourself so far as to betray that you are grossly ignorant, and so God be with you ! Section II. THE DRY-PLATE. ■ HE modern dry-plate has yet to be superseded by a new wonder in the same family. It is one of the simplest yet most mysterious affairs in the world, and its life commenced so recently that a man can claim to have been born before it and yet not assume the airs of a patriarch. To-day dozens of factories are turning out hundreds of boxes of dry-plates every twenty-four hours. A box, in the ordinary smaller sizes, con- tains one dozen plates, each quarter or half dozen plates wrapped in a double black or dark paper, and the individual plates usually sep- arated by a narrow card strip at the edge, or in some other fashion. The dozen plates are packed in a stout pasteboard box and sealed up with edge wrappers, or wrappers covering the entire box. On almost all the boxes will be found the injunction to keep in a dry place, stand on edge and open only in a safe light. If they are kept in a damp place the moisture (35) 36 The Photographic will invade even the careful packing and cause deterioration ; if they are laid flat and box piled on box, or something else piled on them, the chance friction or pressure may cause them to rub or the glass to break ; and finally, if even the slowest grade receives any white light — day-light, lamp-light, electric- light or candle-light — you can throw the box into the dust heap, for you have only a dozen bits of glass 4x5, 5x7, or as the case may be : the magic has all departed. When these plates go into the boxes they are destined to have their first glimpse of daylight only as prisoners in the plate-holders of a camera. If we could take one of the plates out of the box and carry it to the broad light of the win- dow without injury, we would find a piece of glass of the size designated on the outside of the package, and covered on one side with a smooth, rich, cream-colored substance, so even that its translucent effect is like that of a piece of carefully tinted glass. This coat- ing is the thing the light will ruin, and it is the medium for producing the negative which, in turn, produces what we ordinarily call a photograph. The process by which the plate is coated is an interesting one, but is not to be described in detail in this book. The coating is composed of Bromide and Iodide of Potas- sium, Nitrate of Silver and Gelatine, in cer- Primer: The Dry- Plate. 37 tain proportions. The union of these chemi- cals produces an insoluble compound, in a fine state of division, held in suspension in the gelatine, which, before it is used for coat- ing the plates, is boiled and then washed until the by-products of the combination are largely eliminated. The extent of the "cooking" governs the sensitiveness of the film, and, consequently, the activity of the plate when under exposure, so that very fast plates are "well-done" and slow plates "rare," if we apply cook-book language to the matter. The light, coming in contact with this coat- ing, oxidizes the salts of silver and blackens it, and this change is developed or brought out by the developer. The light does not produce any visible effect on the plate, al- though if kept long enough in the light it be- comes overcast with a bluish tinge. Contact with a developing fluid at once causes the ox- idized sections to blacken in gradation as the intensity of the light in the view has fallen on the plate, while the dark or black tones in the view simply leave the emulsion with which the plate is covered unattacked in those par- ticular places, and consequently they appear as clear or nearly clear glass after develop- ment. All of the wonderful delicacy and the merging of the delicate degrees of light and shade in nature are thus reproduced simply by 38 The Photographic a chemical agent bringing them to one com- mon ground of degrees of darkness. If you take a sheet of clear glass and flow some draw- ing ink on its surface with a brush, you will have a greyish black translucent spot. Flow another spot, allow it to dry, and give it a sec- ond coat, and then another spot in which you repeat the flowing operation the third time. There will then be on the glass, when held to the light, three distinct shades of blackness, the first letting some light through, the sec- ond less light, and the third perhaps none. This piece of glass serves to roughly illustrate the whole nature of the negative — the name given to a photographic plate after exposure in the camera and development. The nega- tive is simply a reverse image of the light and shade values in the outlook the lens of the camera has been pointed at, these same val- ues, however, being so delicately graded and reproduced as to far surpass the brush of any artist. To describe further the exact chemi- cal action of the image of light on the sensi- tized plate does not seem to be necessary in this book. As has been stated, the riper or the more prolonged the amalgamation of the chemical constituents of the coating, the more sensi- tive the plate, and the more sensitive the more rapid. Plates are made, generally speaking, Primer: The Dry -Plate. 39 in three distinct grades : Very slow, for the purpose of photographing drawings, pictures and still-life; medium, for landscapes, archi- tectural work, etc., and rapid, for moving ob- jects, portraiture and general work, while we might say that there is a fourth distinct class, the very rapid, whose exposure cannot be measured by the human sense. The two ex- tremes are the most difficult for the amateur to work, and until he becomes well advanced in his experiments he had best leave them alone, unless he wishes to contribute to the support of the plate makers. The very slow plates require skill in timing and development, and the very fast require a good 1 * snap shut- ter, " which will cost nearly as much as the camera. All of these plates are'graded to the reading of what is called a " sensitometer," and the package is marked "Sens. No. — ," with the grade mark used by the manufacturer to des- ignate the particular quality or speed. It is a wise course — and you will find this threadbare statement in every photographic book, big or little — it is a wise course to cling to one brand or make of plate and learn its qualities. There are a half dozen makes on the market which are all the best for some one, for the character of the plate is like the char- acter of a friend, it comes out more and more 4 o The Photographic thoroughly by cont'nuous acquaintance. It is always a mistake for a beginner to buy a box of Cramer's plates, then a box of Seed's, and again a box of Carbutt's, for each make will have a subtle difference, and the results are likely to be uneven when this changeable method is followed. All of these plates are good, and if the first dozen plates you use are unsuccessful, blame it on yourself. Try a second dozen, and think where you may have erred. If the second dozen all fail you, try a third; but there — unless you are an unmitiga- ble blockhead, in which event you will never make a negative with any plate — there you may stop, and conclude that something is wrong with the plates. If there is something wrong, any reliable maker will see that you have justice, but it must be a very rare oc- currence for a man to use two dozen plates without getting some good results, and they do not need to be all good to assure you that the plates are not at fault. The dry-plate, from the moment it leaves its wrapper until the end of its life, which ought only to be when some unkind fate breaks the glass, should be handled with re- spect and care. Treated thus it will give prompt response and yield you generous re- turn. One-half the bad pictures are caused by careless handling of the plate at some time Primer: The Dry- Plate. 41 in its life. Remember that its coating is not only affected by light, but that it cannot be rubbed, scratched, or brought in contact with heat without suffering or being ruined. Prac- tically the coated face ought never to be touched by anything until it meets the devel- oper, although experience will teach the lati- tude in these matters. But the best way to start out is to make up your mind that it shall not be touched by anything, and the degree of latitude in handling will grow upon you as you learn. Finally, treat the wrapper of your box of plates as sacredly as the seal of some one else's letter, until you are in your dark-room, and then you may open it if you intend to quickly shift the plates to your plate-holders. Don't open the box to look at the plates ; it will do you no good, and there is every chance that it will do the plates harm ; very fast plates ought to be handled only in the dark until the moment comes for them to enter the developing tray. Section III. THE DEI/ELOPER. HEN in the dark-room the dry- plate is taken from the plate- holder of the camera, after ex- I posure, no apparent change, as we have said, can be noted. The same cream-like hue extends over its surface, notwithstanding the fact that it has been born to new life in the camera, and only awaits an active agent to make that new life visible. The silver salts of the emulsion coating have been oxidized by the light. The devel- oper sets its seal on the work and by its chem- ical action completes the process, causing these oxidized spots to become black with more or less intensity, according to the strength of light in the image which the lens has cast upon the plate. The plate, before it touches this active fluid, can be said to have no character; the developer brings out or de- velops all the character which the lens image has left there. (42) The Developer. 43 The developing agents have increased in number to a remarkable extent, and in place of a half dozen orthodox solutions, we have to-day every variety in kind and action. To the professional photographer these are of constant use, since, used in combination with his experience, the results are made to vary to suit his special need. Experiments with many kinds of developer are traps for the amateur in his early days, leading him into the same sort of scrapes as the promis- cuous wandering in the field of dry-plates. A developer, and its action on the plate, needs to be studied in the same fashion as the plate itself, and to do this properly the developer ought to be used continuously. At the beginning it is wiser for the student to limit the kind of pictures for awhile, and not try to take portraits, landscapes, still-life, etc., until he has learned to take one kind of pictures well. The range is very much easier afterward, and by thus limiting the kind of subject he can limit the character of his de- veloper. In a short time he will know Pyro or Oxalate or Hydro in all their shades of feeling, and then, if adventurous, can go out on the vast and increasing sea of develop- ing solutions. The following formulae have been selected with care, and are given here under their 44 The Photographic proper heading in the book, although the beginner will find them more interesting after he has completed the reading of Section II., in Part II., on Development. Each developer has a number attached to it, purely for con- venience in referring to it later on. No. i. Hydroquinone Developer. ' Hydroquinone 18 grains Sulphite of Soda (crystals) . . 100 grains Citric Acid 6 grains Bromide of Potassium .... 3 grains Distilled Water 2 ounces Caustic Soda 18 grains Distilled Water 2 ounces Use A and B in equal parts when making ready for development. No. 2. Pyrogallic Acid Developer. * f Sulphite of Soda (crystals) . . iy 2 ounces \ Water 4 ounces t> f Carbonate of Soda 1% ounces \ Water 4 ounces C Saturated Solution Bromide of Ammonium Keep the above as stock solutions, in sepa- rate bottles, and when ready to develop take Water 4 ounces Pyrogallic Acid 25 grains A 1 ounce B 1% drachms C 2 drops Weigh out the dry Pyro (Schering's re-sub- limed Pyrogallic Acid is best), and dissolve in the water; then add the other ingredients. Never use Pyro developer except fresh, if you Primer: The Developer. 45 desire good results. Thus used this developer works finely, and will never stain. Should you have a negative stained by Pyro, the stain may be removed by soaking in Sulphate of Iron i}4 ounces Water % pint Sulphuric Acid (c. p.) i drachm Alum }i ounce No. 3. Pyrogallic Acid Developer. (As successfully used by Dr. Jesse C. Millen.) Each fluid ounce of the developer contains Water 1 ounce Carbonate of Soda 10 grains Sulphite of Soda (crystals) .... 20 grains Pyrogallic Acid 2 grains Bromide of Potassium 1 grain The Pyro is always to be kept dry, weigh- ing it out and dissolving it in the water of the formula when ready to use. The other ingredients may be made into stock solutions by dissolving larger quantities in water in separate bottles in the proportions given above. (For instance, an 8-oz. stock solution of the Carbonate of Soda would be made by taking 8 ounces of water and dissolving in it 160 grains of the Soda, so that each half ounce of the fluid would have 10 grains of soda, and making the Sulphite of Soda solu- tion in the same way would give each half ounce of it 20 grains of the Sulphite. The united two half ounces would then make one fluid ounce containing 10 grains of the Car- 4 6 The Photographic bonate, and 20 of the Sulphite. ) For each ounce there can then be added 2 grains of the dry Pyro, and 1 grain of the Bromide. When fresh, this developer works clear and bright, and does not stain. When the exposure is anywhere near the right time, the resulting negatives are fine and spark- ling. No. 4. Pyro-Ammonia Developer. Pyrogallic Acid 8 grains Bromide of Potassium 8 grains Ammonia (strong) 8 drops Water 4 ounces For under-exposed plates and snap-shots, this is one of the best developers ever formu- lated. It does not fog the negative, but gives it a brilliant quality, full of detail. It does stain both the negative and the fingers, but this interferes with the final result only in making the printing very slow. No. 5. Metol Developer. (As successfully used by Mr. J. L. Dillon.) ( Metol 1 ounce A \ Water 60 ounces ( Sulphite of Soda (crystals) . . 8 ounces r> j Carbonate of Soda 8 ounces ( Water 60 ounces c j Bromide of Potassium 8 ounces ( Water 16 ounces In using take equal quantities of A and B, and if the development proceeds too quickly, Primer: The Developer. 47 use a quarter to a half ounce of C to each 8 ounces of the developer. The keeping qualities of this developer are excellent, and it does not stain either the hands or plate. In combination with the Acid Fixing-Bath, it makes an ever-ready developing and fixing outfit. The old solu- tion can be used for over-exposures, the fresh for normal exposures. No. 6. Metol-Quinol Developer. Warm Water 27 ounces Metol 15 grains Sulphite of Soda (crystals) . . \ x /z ounces Hydroquinone 1 drachm Bromide of Potassium 4 grains Carbonate of Potassium .... 5 drachms No. 7. Iron Oxalate Developer. (Neutral Oxalate of Potash ... 16 ounces Hot Water 48 ounces Acetic Acid 3 drachms {Proto-Sulphate of Iron 16 ounces Hot Water 32 ounces Citric Acid % ounce ~ f Bromide of Potassium x /z ounce \ Water 1 pint Let both solutions cool off before use. They will keep for months in separate bot- tles. The iron (B) solution should be well stoppered, and rejected if not perfectly clear and green. Exposing in sunlight occasionally will keep it in good condition. To use, take 6 ounces of A, 1 ounce of B, and yi drachm of C, mixing them in the 4 8 The Photographic order given. Under no circumstance must A be poured into B. As a general caution, be careful to avoid the contamination of your Iron Developer with Pyro. Rodinal is an extremely simple and safe developer for the beginner. It is put up and sold in one solution, simply requiring dilu- tion with water to be ready for use. The results are clear and brilliant, and sure to give satisfaction. To briefly review the various developers we have mentioned : No. i, Hydroquinone, gives very satisfactory plates, and is extremely clean for the amateur to handle. It also has the virtue of being in one solution, and thus helps towards simplicity. The plates devel- oped with it are hard and sharp, generally speaking, and it suggests itself as an excellent solution to use on negatives of line drawings, or any work requiring sharp definition, rather than soft effects. Skillfully handled, it can, of course, be used on almost every variety of exposure. The developers Nos. 2, 3 and 4 represent the Pyro group, or those into which Pyro- gallic Acid enters as an active agent, and the memoranda already given are sufficient to show the range of their work. Nos. 5 and 6, the Metol and Metol-Quinol developers, rep- resent two reliable formulae for this very use- Primer: The Developer, 49 ful agent (Metol). The keeping qualities of Metol are remarkable. It is clean, both in connection with the plates and hands ; its ra- pidity and power while acting on the plate, and its efficacy in bringing up detail on under- exposed plates, are qualities that seem to be possessed in great part by it alone. The stock solutions, in separate bottles, keep in- definitely, and even the mixed solution has a very great length of active life, so that the expense of new chemicals and the time used in mixing them are both reduced. The Oxalate Developer, No. 7, is not adapted to fast plates or fine detail, requiring very skillful handling to secure these effects with it, but for line negatives, photographs of engravings, or where black and white ef- fects are desired, it is extremely useful. The last developer mentioned, Rodinal, we consider the most desirable solution for the beginner, for in his first experiments there is less liability of his making mistakes with it, mistakes which he cannot trace. From every point of view it is one of the most re- markable and excellent one-solution devel- opers which can be bought. Prepared by experienced manufacturers, its quality and strength are not likely to vary, and compara- tive results can be safely made. Instantaneous Exposures have their sue- 5° The Photographic Primer. cessful qualities better insured if placed for from 3 to 5 minutes before development in the following solution : Carbonate of Soda 5 drachms Distilled Water 7 ounces This solution may be kept and used again. Acid Fixing-Bath. a f Hyposulphite of Soda .... 32 ounces \ Water 3 quarts f Water 1 quart g J Sulphuric Acid y 2 ounce I Sulphite of Soda (crystals) . . 3 ounces [ Chrome Alum 3 ounces When dissolved, pour B into A. This is a thoroughly reliable bath, and keeps indefinitely. Frilling (or 11 crimping") of the film on the plate, or softening are entirely prevented, and clear, crisp negatives result. Fresh Hypo may be added as the solution weakens, or a new bath made up. During cold weather half of B is sufficient. It is not necessary to use the Acid Fixing Bath, as the plates can be fixed in a simple solution of Hypo, as follows : Hyposulphite of Soda 4 ounces Water 1 pint All developers must be kept cool in sum- mer and not too cold in winter. To keep the fixing bath cool in summer, place a lump of hypo in one corner of the tray, and as it dissolves it will lower the temperature of the solution perceptibly. PART II m Section I. THE EXPOSURE. FTER you have learned to handle your camera, without attempting to take a picture, and gotten the working of it so easy to hand that you can do everything rapidly and evenly, you will be ready to try your first ex- posure in the field. Take your three plate-holders and box of plates (unopened) and go into your dark- room. It is assumed that you have spent a half-hour in this room in total darkness, spying for any cracks which admit daylight or any other kind of white light, and that you have found it absolutely dark. (If you have any doubt on the subject, you can find in the next section of the Primer a method of proving the integrity of your dark-room. ) Light your developing lantern and fix it to cast only the deep orange-red light. Then open the box of plates by running a pen-knife blade around the edge at the bottom of the box where the paper is pasted and lapped over the open (53) 54 The Photographic joints. The box is telescopic in form, one half fitting into the other, and some plate- makers pack the plates in a double box, both telescopic and one smaller than the other. Inside the box you will find two flat pack- ages, each wrapped in dark paper and each containing six plates. Remove one of these packages and close the box as you found it. (You need not paste the paper over the joint, of course.) The box with the remaining plates had best remain in the dark-room, or, at any rate, be put away in a dark, dry closet. Take the package of six plates removed and unwrap carefully, keeping a couple of feet away from your lantern or light. Take up a plate-holder and remove both slides, laying them with their outside faces downward upon the table or shelf in the room. Then take one plate from the package, handling it aitirely by the edges. If you glance along each side, holding the plate at an angle with the reflected light, you will find that one side is highly pol- ished and the other dull. The dull side is the coated side and in placing the plate in the plate- holder this face is put outward next to the slide, the polished side being the clean glass of the back of the plate. You have learned, of course, as previously advised, to put a piece of plain glass in the holder, and so find no difficulty in doing the same thing with the Primer: The Exposure. 55 coated plate. Have ready a small, flat brush of camel's hair, clean and dry, and with its soft surface remove any dust from the face of the plate ; and then, if you are sure the plate is in its proper place, put the slide in at once, remembering that as you have laid the slides the top face goes next to the plate. Then turn the plate-holder over and put another plate in the other side, and so on until the three holders are full. You can then come out of your da»k-room and put the holders in your camera carrying case. These general directions for filling the plate-holders apply to all kinds of plates except the extremely rapid. When you come to use these you should put them in the holders without using any light, in perfect darkness, by mere sense of touch. To tell the coated side of a plate you have but to remember one thing. Every two plates of the six are packed as couples, face to face, so that the first plate you pick up has its coated surface down,, the second plate has its coated face up, the third down, and so on. The choice of your first subject is left to your own sweet whim, but a bit of landscape is the simplest thing to handle. And a few words on this subject must condense the infor- mation you will find in books on the charac- teristics of views as adapted to pictures. It 56 The Photographic must be borne in mind that any real work of art is always limited as to the field of its sub- ject, and that the choice must be made of a sectio?i of a wide view, else the picture will be a flat failure. Whatever you choose to point your camera at should have something in the foreground, fairly close to you, which will be the strong note in the picture, and give it its character. The human eye can sweep over a wide view and take it all in ; the lens cannot, and when it is made to do service as the por- trayer of a panorama, the value of the result is depreciated in proportion to the greater field you try to make it cover. This subject you must think about for yourself and by de- grees gain the right sense of proportion in values, as the relative parts of a picture are called. At any rate, be content with a nar- rower outlook to commence with, and you will not be so disappointed in your early pictures. Arrived at the point where you wish to make the picture, take out the camera and put it on the tripod, as you have learned to do already. Take off the lens cap, and with the largest stop in your lens, see what sort of view you have on the ground glass. Study it awhile, and make sure it is somewhere near what you want, moving the camera by swinging it around on its tripod pivot, or moving the whole affair, if necessary. When the ground-glass picture Primer: The Exposure. 57 is what you think it ought to be, then exam- ine your camera carefully and see that it is level. If you have a poor eye for such busi- ness, you may add a pocket-level to your out- fit at a cost of 25 cents. With this level you can manage the whole business quickly and neatly, and after making sure that your tripod is firm and your camera box level both ways, take another look at the ground- glass picture. The shifting of the camera to get it level may have left something out of the picture which you wished to have in it. If it is to one side, you can swing the camera on its pivot ; if it is above or below, you can raise or lower the sliding front board, on which the lens is established, until everything comes on the plate as you want it. It must be noted, how- ever, that the extent of moving the sliding front is controlled by the covering power of your lens. If it is only intended to cover or make a 4 x 5 picture (assuming this as the size of your cam- era), the raising or lowering will tend to make the other margin of the view on the plate somewhat undefined and not sharp. The movement of the front throws the center of the lens above or below the center of the plate, and leaves the part farthest from the center of the lens less sharply defined. It is partly for this reason that, having estab- lished the whole of the image you wish to have The Photographic on the plate, you should re-focus and get everything sharp and clear. It is presumed that you focused or moved the front board of the camera by means of the controlling screw and notched track when you first looked at the picture, but some little difference may have been made by the movement of the camera to get it level, and you can now fix it absolutely. Try now with one of the smaller stops or diaphragms, slipping it into the slot in the lens tube, or as the case may be, and looking at the ground glass once more. The brightness of the picture is lessened, but the sharpness will be found increased. When the picture is sharp and clear just outside of the center, secure the sliding front of your camera by whatever device the camera furnishes, an O the BEST Plate for Beginners. J. C. TABLOIDS A powerful developer, specially intended for instanta- neous exposures; produces good negatives with only half thk ordinary exposure; equally good for time exposures and developing lantern slides. Price, 75 cents per box, post free. Contains enough to de- velop 6 to 12 dozen 4x5 plates or films. Simple, Clean and Handy J^Send 10 cents to Factory for Sample Package. JOHN CARBUTT Keystone Dry-Plate and Film Works Wayne Junction, Philadelphia For Sale by all Merchants in Photographic Materials SAVE YOUR EYESIGHT By using a Carbutt Multum-in-Parvo Lantern to develop by. $6, delivered. Send to factory for descriptive circulars. If you arc interested in ART WORK * 28 W. Lexmgfton St., Baltimore, Md. for Illustrated Catalogue of Artists' Materials and White China for Decoration You can procure of them the largest variety, low- est prices and best quality of goods. Sole agents for PREMIER CREPE TISSUE PAPER, furnished in 32 colors. Sample card sent on request. Manufacturers and Importers of Oil Colors French White China for Write to Hirshberg, Hollander & Co* Water Colors China Colors Pastels ♦ Crayons Canvas Decorating Mathematical Instruments, Draw- ing Papers, Etc. * Easels Brushes * Studies Send for a fired sample of it THE FINEST LENSES IN THE WORLD ARE VOIGTLANDER & SON'S Famous Euryscope Lenses and their latest MARVEL The Collinear Lens *Qt FOR EVERY POSSIBLE USE IN PHOTOGRAPHY Sole American Agents: Benjamin French & Co* 3J9 Washington St., Boston, Mass. * Price-List sent free on application. THE Scovill & Adams Company of New York are Manufacturers and Importers of and Dealers in an Unequaled Variety of Photographic m m r i Vjooas ♦ ♦ ♦ ♦ EMBRACING Every Requisite for the : j : * : : Practical Photographer. THE LARGEST AND OLDEST PHOTOGRAPHIC ESTABLISHMENT IN THE COUNTRY. Publication Department, Publishers of "The Scovill & Adams Photographic Series" (56 publications), the "Photographic Times An- nual," "The Process Worker," etc., etc. A New Catalogue of Photographic Books and a copy of " How to Make Photographs" sent free on application. The Scovill & Adams Co. of New York W. I. LINCOLN ADAMS, President 60 and 62 East Eleventh St., NEW YORK ^po that select, though limited class • ♦ ♦ ♦ Who find beauty in any medium which fig* tells the story of the negative fully> *^ yet unobtrusively, and without useless accessories, we appeal. A Blue-Pr int paper capable of reproduc- ing all the detail of the negative, having brilliant half-tones and pure high-lights, was unknown before we placed ¥ ¥ ¥ FRENCH SATIN JR. * * * * on the market. With the introduction of our paper, however, all these desirable features were obtained, and a medium produced on which the finest pictures are easily and quickly made. All the trouble- some baths necessary with the silver salts are avoided, and the print produced with a minimum of expense, both in time and labor. BS^Write for our Booklet and a sample print. J. C. MILLEN Sole Manufacturer 919 and 921 Arch Street, PHILADELPHIA, PA. HiggW ^ Photo-Mounter THE ADHESIVE FOR MOUNTING PHOTOGRAPHS, ETC. Higgins' Photo-Mounter is a beautiful pure white adhesive, finely scented; a perfect homogeneouss olu- tion, in a soft, pasty form, from which the water never separates, as in the common starch and flour pastes. Its beautiful, soft, unctuous consistency, and its wonder- ful smooth and easy spreading qualities (non-fluid at rest, but fluid under the movements of the brush) are possessed by no other adhesive, and are of the greatest importance in perfect and easy mounting. Does not strike through nor warp, adheres instantly and power- fully, dries quickly, and prevents curling off at the edges. Guaranteed never to change or deteriorate. Un equaled for mounting photographs, textile samples, scrap book, tissue work, and general use as a substitute for mucilage. Refuse all Imitations or Substitutes' AT ALL DEALERS A 3-oz. jar prepaid by mail for 30 cents, or descriptive circular for nothing, from CHAS. M, HIGGINS & CO.,Mfrs, J68, 170 Eighth St., Brooklyn, N. Y. LONDON OFFICE, J06 Charing-Cross Road Honest Inquiry addressed to us will bring An Honest Answer We will consider YOUR interest in recommending a camera or any supplies, regardless of the profit result- ing from a sale. If in doubt write to us, and what we tell you will be the truth. We are not selling goods below cost, but we make a fair profit, no more nor less, on all our goods. SCR ANTON PHOTO SUPPLY CO. SCRANTON, PA. Hugh Morrison Robert A. Morrison W. Howard Morrison Hugh Morrison & Sons Successors to John W. Morrison Dealers in ... . PHOTOGRAPHIC MATERIALS Hand Cameras and Amateur Photo. Goods of all kinds a specialty .... No. 10 Sixth St., PITTSBURGH, PA. Endorsed by all who try it. French Satin Jr. THE STANDARD BLUE-PRINT PAPER. ¥ We are constantly in receipt of testi- monial letters from leading amateurs who are surprised and delighted at the results with this paper* ¥ ¥ ¥ ¥ ¥ ¥ ¥ * FRENCH SATIN JR. gives rich, deep shadows, pure high -lights and full detail* It will do all that silver paper will, and with no troublesome baths* ¥ ¥ ¥ THIS IS NOT AN ORDINARY BLUE -PRINT PAPER, but an article manufactured expressly for Photographic work, and possessing real merit* ¥ ¥ ¥ PRICE-LIST ON REQUEST J. C MILLEN Sole Manufacturer 919 and 92J Arch Street PHILADELPHIA, PA. THE Presto POCKET CAMERA A Midget in Size A Giant in Capacity (The Prksto measures 1)3x2/8x3^ inches; it makes pic- tures 1*4x1% inches, and weighs rive ounces.) ^» FILM or GLASS PLATES can be used at will — 50 negatives can be made at one loading of film. 4 negatives on glass plates can be made at one loading. <^ The Presto Pocket Camera Handsomely finished and loaded for 25 exposures, together with one Film Magazine and one Glass Plate Magazine and Primer, with fall instructions, securely packed. PRICE, $2.50. By express to any address on receipt of price. 4f^*Send for Booklet fully describing the Presto. The Scovill & Adams Co. OF NEW YORK, Sole Trade Agents, 60 and 62 East Eleventh St. NEW YORK G. CRAMER DRY-PLATE WORKS . . . jtesa— . St* Louis* Mo. Full descriptive catalogue sent free to any address on application . . . ♦ . . . THE . . . Photographic Times An Illustrated Monthly Magazine Devoted to the Interests of Artistic and Scientific Photography Each number contains many artistic Reproductions from Photographs, besides full-page Photo-Gravures, Colored Illustration! and original Photo-Engravings 64 Pages of Interesting Reading Matter $4 PER YEAR 35 CENTS PER COPY Send 35 cts. for a Sample Number The Photographic Times Publishing Association A. C. LAMOUTTE, Manager 60 and 62 East Eleventh Street NEW YORK ffl For Pointers 3W ffi send and get our Handy Price-List FOR Photographers We have a bargain lot of second-hand Cameras and Lenses advertised in The Photo-American* 10 cents in stamps secures you a copy. Send us your name anyway CHAS, H, LOEBER 12 East I7th Street Hear Union Square NEW YORK mateur IW\ A Photographers 7 1§5sm and a complete price-list of French Satin Jr. 919-921 Arch St. j§${ WHO USE Blue- Print Paper are requested to send for our descriptive pamphlet, contain- ing full printing; directions m 'A* The Standard Blue-Print Paper. \^{$\ Your name and address on a j,^ \liM\ postal is sufficient fep III PHILADELPHIA : : : : PENNA. fW SUCCEED . ♦ ♦ ♦ ♦ ♦ Use Scovill Apparatus Waterbury Single View Lenses Morrison (Wide- Angle) Lenses Zeiss Anastigmatic Lenses Hammer, Record, and Carbutt Plates Three Crown Albumen Paper Ilo (Collodion) Aristotype Paper Albuma (Gelatine) Aristotype Paper Waterbury Cardboard "Non-Cockle" Paste Merck's Superior Pyro S. P. G Chemicals (Send for the Scovill & Adams Co.'s Catalogue.) The S* & A. Photographic Publications and The Photographic Times. Send for Catalogue of Photographic Publications. Scovill & Adams Co* of New York 60 and 62 E. Eleventh Street, NEW YORK And The We are Trade Agents for French Satin, Jr., the Standard Blue Paper. ^3 GETTY RESEARCH INSTITUTE 3 3125 01410 3747