THE SUPPLEMENT To a Small TREATISE Called Salt-water SWEETENED: SHOWING The Great Advantages BOTH BY SEA and by LAND, OF SEA-WATER made FRESH.  
TOGETHER With the Honourable Mr. boil's Letter, and the Approbation of the COLLEGE of PHYSICIANS, of the Wholsomness of this WATER.  
and also the CONDITIONS on which the PATENTEES and others concerned, do intent to contract with such as shall please to deal with them for the Use of this INVENTION.  
The Eighth Edition, July 23.  
LONDON, Printed by John Harefinch in Mountague-Court.   

TO THE KING'S Most Excellent Majesty.  
SIR,  
WHEN Mr. boil, with my Partners, and myself attended Your Majesty with the Experiment of Reducing Salt Water into Fresh; your Majesty seemed so well pleased with an Invention of that Universal Benefit, that We cannot but with our Humblest Duty, acknowledge your Gracious Reception of it; However, as your Great Wisdom and Judgement is not easy to be surprised, and your Royal Approbation never known to be your hasty Act of Grace; your Favour and Patronage was not fully obtained, till with the strictest Scrutiny you had first examined those Hopes and Probabilities, you vouchsafed to encourage in Us.  
But, when upon further consideration, We had obviated all Difficulties, and solved all Objections against this Undertaking, (which We hope will appear in this Printed Paper,) your Majesty was Graciously pleased to give us your Approbation, and to Order us your Letters Patents, which Grace and Favour, aught to be, and is received by Us with the deepest sense of our humble Acknowledgements and Gratitude.  
And if the Fruits of your Royal Grant has not hitherto been derived to Us, 'tis partly by some Obstacles we met from the suggestions of a private Person, but more especially by the late Horrid Conspiracy, when, not only our Loyal apprehensions for your Majesty's Danger, diverted our Thoughts from all other Concerns, but likewise we judged it a part of our Duty not to be pressing on your Majesty's Goodness, or on your Ministers of State, in so Important a juncture of Affairs: But having now regained Leisure and Freedom after the dissipation of the greatest part of our Fears, We presume a second time to lay these Endeavours at your Feet, as best Entitled to the Patronage of so great an Undertaking by Your own Subjects, and best able to Recommend it to the World by your Royal Approbation.  
This Experiment is in a great degree owing to the Eminent Mr. boil, and indeed well worthy so Ingenious a Promoter, being so much the more the Favourite of his happy Genius, as it is universally useful to Mankind; But whatever Advantages this Country, or indeed the World, may receive by it, his whole Ambition is bounded in the public Profit, contenting himself with no other Benefit from it, than the satisfaction and pleasure of seeing it accomplished by his Friends.  
The advantages in regard to Navigation, especially in long Voyages, which are subject (through often Calms, and on several other accounts,) to distress for want of Water, and the Benefits to Sea-Towns, which are incommodated by Brackish Waters, Together with the Easiness, Cheapness, and Wholesomeness of this prepared Water, are the principal scope of these ensuing Papers, which are Humbly Dedicated to your Majesty's Perusal, Favour, and further Approbation, by  
Your Majesty's most Dutiful and Obedient Subject, R. FITZGERALD.   

The foregoing Dedication, Humbly offered to His Majesty, having discovered the Intention of this Undertaking; it remains now to satisfy all Reasonable Scruples which have been raised concerning the Wholesomeness and Cheapness of Water thus prepared.  

The Queries and Answers follow.  
Quest. 1. IF this Water can be made in sufficient quantities to serve the Uses of any Ship at Sea?  
Ans. About Ninety Gallons may be Prepared in every Twenty four Hours by an Instrument of 33 Inches Diameter, which will stand under the Deck of any Ship; and it's computed that less than three Quarts is a good Allowance for any man in that time: And if a large Ship, wherein there are many men aboard, should require more Water, than two or more of the Instruments may be had upon reasonable Terms, and one man may attend several of them.  
Quest. 2. In case the Operation be by Fire, it may require a Skilful Chemist, or one knowing in such Operations, to be on Board every Ship, who will require great Wages.  
Ans. There will be no occasion for any such Person, for any Seaman may be Instructed in an Hour or two to prepare this Water.  
Quest. 3. It's probable that the Engine may be frequently out of Order, and being so at Sea, where Artificers and Tools are wanting to repair it, there must necessarily follow want of Water, which will be of Ill Consequence.  
Ans. This Engine is of such Contrivance, that it's never likely to be out of Order.  
Q. 4. Can this Engine be of use in Stormy-weather?  
Ans. Since a sufficient quantity of Freshwater may be so easily had by this Engine, the Mariners will be careful to make a good Provision of it beforehand; however 'tis not to be doubted but it will answer the worst Accidents of the greatest Storms, and have its Effect sufficiently in the worst Wether, especially considering that in such desperate Extremities men must be content with smaller Allowances.  
Quest. 5. The Operation being by Fire, it may endanger the Ship, and the Smoke be very offensive?  
Ans. The Engine may easily be placed in any Ship without danger of Fire, or offence of Smoak.  
Quest. 6. Will not the Charge of this Instrument and Materials belonging to it be very great?  
Ans. It is difficult to make exact Answer to this, but an Instrument of the largest Size, with all the Materials belonging to it, will not amount to above 18 pound, and may last many years, and according to the Rates of Ships, they may be proportioned both in Bulk and Price. And where it may be thought necessary to make use of this Experiment on Shore, for Brewing, or other uses of a Family, Instruments and Materials may be very large, and very much cheaper on Shore, than at Sea.  
Quest. 7. Will not the Fuel be very Chargeable, and take up much room in the Ship?  
Ans. The quantity of about ninety Gallons of Water, may be prepared with less than three pecks of Coals, and proportionably with any other Fire; and the whole Room that will be taken up in the Fire, and in the few Casks to be employed in the making and receiving this Water, will be less than the tenth part of Stowage now employed for Water only, and upon a strict Computation made by the Persons concerned in this Grant, the whole charge of Water will come to less than an half penny per Gallon.  
Quest. 8. Will not the Ingredients take up much Room, and be very Chargeable?  
Ans. A Vessel less than a Barrel may contain enough of the Ingredients to carry a Ship to the East Indies and back again; and the Ingredients for near one hundred Gallons of this Sea-water will not amount to above 12 Pence, and will be cheaper when great quantities are used at Land.  
Quest. 9 Admitting this Preparation of Water may be made, and in sufficient Quantities, it may be doubted whether it be wholesome?  
Ans. The Famous Lord Bacon, having written learnedly of this Subject, had not the least thought that the Sea-Water, after it had been Dis-salted, without any Noxious addition, was Unwholesome: and it neither now is, nor ever was really doubted whether it were wholesome; However, because invidious Persons, who are no wellwishers to Ingenious Designs, may possibly raise Scruples, the Gentlemen who are concerned in this Grant, have purposely, to give Public Satisfaction, sent a large quantity of this Water to Doctor King, a very Ingenious Physician, who is a Member of the College, and of the Royal Society; who finds,  
1. That it is Lighter than most of the Waters about the Town.  
2. That it is without Sediment, and Transparent as any other Waters.  
3. That it lather's (as they call it) with Washball or Soap, better than other Water, and with less Soap.  
4. That Sugar dissolveth sooner in it, than in other Water.  
5. That it Evaporates sooner than common Water.  
6. That whereas common Water Putrifies and yields a Stinking Smell within a few Weeks, this has continued Sweet and unaltered several Months, and may yet do so much longer, being still in as good condition as it was above Eight months ago, November the Fifteenth, 1683.  
7. That it makes Jellies as firm and good as any Water.  
8. That it Boils Pease to Tenderness, Beef, Mutton, Fish, and all other Meat, without giving it an ill Taste or Colour.  
9 That it has no kind of ill Taste in itself, and Boils in Milk without Curdling.  
10. That Flowers, Plants, and all Vegetables grow in it at least as well as any other Water.  
11. And that small Animals live and grow in it.  
Several men of great Quality, viz. The Earls of Shrowsbury, Westmoreland, Mulgrave and Burlington, the Lord Dunbar, Lord Lumley, Lord Falconbridge, and Lord Chumley, besides very many Gentlemen of Quality, who frequently drink Water, Officers of Sea, and Physicians, have Drunk of this Water without being in the least indisposed after it; but, lest any doubts may remain after this, of the Salubrity of the said Water, the following Testimonial of these Learned and Eminent Physicians is here inserted. And a further account of new Experiments, made by an ingenious Physician, is now at the end of this Treatise Printed.   

The Approbation of the College of Physicians, and other Doctors of Physic, Practising in and about London.  
WHereas we have received an account in a Gazet published some months since, that the Honourable Robert Fitz-Gerald, Esq hath found out the way and means of reducing Salt-water into Fresh, in quantities sufficient to serve Ships at Sea. And for as much as some Persons may possibly make a doubt, if the said Water be wholesome after the Salt is taken out of it. We therefore, considering of what general Advantage this useful Experiment may be, having fully informed ourselves from Mr. boil, that the said Experiment is made by Fire. And having also seen an account of some Experiments made by some Members of our own Body, do declare our Opinion, that We believe the said Water is very wholesome, and may be safely used. And being further acquainted by the said Mr. boil, that the very few Ingredients made use of in the said Operation, are fixed in the Fire, and give no noxious quality to the Water; We are therefore of Opinion that the same may be safely used, and is at least as healthy as any other Water used at Sea. All which we certify (at the Request of the Honourable Robert Fitz-Gerald.)  

D. Cox, President,  
Sir C. Scarborough, Knt.  
Dr. Daniel Whistler,  
D. Weatherly,  
Dr. Will. Denton,  
Sir T. Millington Knt.  
Dr. Walter Needham,  
Dr. Thomas Short,  
Dr. Thomas Allen,  
Dr. Edmund Dickingson,  
Dr. William Croone,  
Dr. Richard Lower,  
Dr. John Windebank,  
Dr. Daniel Cox,  
Dr. James Rufine,  
Dr. Charles Conquest,  
Dr. Edmund King,  
Dr. Willowghby,  
Dr. Tho. Sydenham,  
Dr. Edward Tyson,  
Dr. Nehemiah Grew,  
Dr. David Abercromby,  
Dr. Andrew Creagh.   
Though Phsiyck has always flourished in this Kingdom, yet in this Age it is in greater Perfection than ever; being improved, both as to the Practical and Speculative part, by the present Fellows of the Famous College of Physicians; who, being Men of great Practice and Eminent Learning, cannot but give full satisfaction to all such as inquire concerning the healthfulness of this Water; Their Opinion being, in this particular, the more valuable, because it is to their own Disadvantage; ●nce the Brackish Waters of the Sea-Coast, and the putrifying Waters made use of at Sea, might probably have afforded them a 〈◊〉 number of Patients, which may hereafter be lessened by the use of this wholesome Water.  
Since the first Edition of these Papers, his Majesty has been pleased to see some Experiments, which has so convinced his Majesty of the healthfulness of this Water, that he has resolved to have it generally made use of in his Seaport Garrisons; of which an account has been given in several Gazettes, by His Majesty's special Order.   

The Benefits and Advantages of Sea-Water made Fresh.  
MUch Stowage will be saved, so that a Ship of 50 or 60 Tun, and proportionably of greater Bulk, may take in several Tuns of Goods more than formerly they used to carry; which will considerably advance the Trade of all Merchants, and be of vast profit to the Masters or Owners of Ships.  
The Charge of Casks is very considerable, especially when bound with Iron, as all Sea-Casks must be; And by means of this Engine, three fourth's of that charge will be saved.  
The tear and wear of Boats often going from Shipboard, and frequent loss of the Boats and men in Stormy Wether, and the Op●●●●nity of the Seaman's being Drunk or shore; by which many fatal accidents do happen, (by means of having this Water-Engine) will be prevented.  
Ships in long Voyages have been forced to run many Leagues from their intended course, which much retards their Voyage, and makes them lose fair Winds, and maintain more Seamen at charges of Diet and Wages than they have occasion for; which inconveniencies may be prevented by having Water within themselves.  
Ships are often forced to leave their Anchors and Cables behind them, by being forced into dangerous Shores upon account of taking in Fresh Water.  
In the African, East and West India Voyages, great quantities of Fresh Water are necessary, which the Seamen are forced to put above Deck for want of room, which is great hindrance to a Ships Sailing, and much endangers and weakens a Ship.  
In case of Calms, which often happen in the narrow Seas, but especially near the Line, this Instrument will be of vast advantage, by affording fresh and wholesome Water, instead of that which is unwholesome and offensive.  
Essex, Kent, and all other the Seacoasts, in any part of the World, that want wholesome Water, may be easily and cheaply supplied by this means; as also Venus 〈…〉 Windam, and all other Towns or Places that lie near the Sea, and either want good, or have Brackish Water.  
In time of War, whole Navies may be relieved by this Engine, and Opportunity given of making the greatest Discoveries imaginable.  
It is further to be considered, that hitherto the richest and ablest bodied Seamen have been averse from undertaking long Voyages, by reason of endangering their Healths, and Lives, by making use of putrified Water, which inconvenience is not now to be feared, their being such useful hopes of Fresh Water by the use of this Engine; and possibly a smaller number of men may serve the use of Ships than do at present, by which much Charges will be saved to the Masters and Owners of Ships; and Merchants may Trade upon easier Terms.  
In Portsmouth, Rochester, the Fens of Lincolnshire, and any other places near the Sea, where Waters are Brackish, and consequently unwholesome, this Engine, etc. may be very useful, and where there is room enough to place it, very great quantities of Water may be had for the use of whole Families, and the Ingredients when used in great quantities may be afforded at a cheaper Rate.   

A LETTER of Mr. boil's to the Learned Dr. JOHN BEALE, Fellow of the Royal Society, concerning Freshwater made out of Sea-water: Printed at the desire of the Patentees.  
SIR,  
TO give you a short Account (suitable to the little time I have to do it in,) of the Transaction, which I suppose must have given the rise to the Mention made of my Name in the public Gazette,: I must inform you, that one of my nearest Relations, (Captain Fitz-Gerald,) and some other Worthy Gentlemen, having acquainted his Majesty, that They had an Invention for making Sea-water sweet and wholesome in great quantity, and with small Charge, and that I had examined, and did approve the Water so prepared; His Majesty was pleased with very Gracious Expressions, to command Me to attend him with a further and more particular Information. Having readily obeyed this Order, and been made acquainted with the Objections the King thought fit to make against the Practicableness of the Invention; which, (though a private Man had urged them,) I should think the most Judicious that have been framed against it; I humbly presented to him, that I looked upon this Invention as Comprising two differing things; a Mechanical part, which related to the Engine itself, and the use of it a Shipboard▪ and a Physical part which 〈◊〉 the Potableness and Wholsomness of the Liquor. About the former of these I did not pretend to clear the Difficulties, especially such strong ones, as His Majesty had proposed; but left it to the Patentees to give him Satisfaction, which they were in a readiness to offer. But as to the Wholsomness of the prepared Water, I had made some Trials upon the Liquor, which gave me no just Grounds of suspecting it to be unwholesome, but several Motives to believe it well conditioned, and of great use to Navigators, and not to them only. And having hereupon briefly acquainted His Majesty with the chief Trials I had made to examine this Sweetened Water, He was pleased to look upon them as Satisfactory, and vouchsafed on that occasion to Discourse as a Virtuoso, of the Sea and Brackish-waters, and gave me some new, as well instructive Observations about them: and in conclusion, dismissed the Patentees with a Gracious Promise of his Royal Protection, and peculiar Favour.  
To this short Narrative it now remains, that I briefly Subjoin the chief things that persuaded me of the Salubrity of this Water, (whence may be justly and easily inferred, the Utility the Public may receive by a cheap and easy way of preparing it.) First, than I considered that almost all the Rain-water that falls from the Clouds on the Main Ocean, and which (except perhaps in very few Places in Torrid Climates) is unquestionably received as wholesome, must be afforded by the Sea, and consequently be but Sea-water freed from its Salt, (according to the famous Motto, Redit Agmine dulci.) Next I found, (as his Majesty himself had done,) that the Liquor was well tasted, and without any sensible Brackishness; and some of it continued for between 4 or 5 Months in a large Crystal Bottle, that I purposely kept unstopped, and for the most part in a South Window, where it neither did, nor probably in a long time, will putrify, or so much as appear troubled or less transparent; during which time, it was with Approbation tasted and smelled by several Learned Physicians of the famous College of London. Thirdly, I found it laver very well, which most Pump-waters, and many others that have some little (though unperceived) common Salt in them, will not do. Fourthly, this Water will boil Pease tender, which amongst Seamen is one of the principal signs of good Water. Fifthly, In very good Balances, with an Instrument that I purposely caused to be made for the nice weighing of Liquors, I found this Water far less heavy than one would expect; for if it differed at all in weight from the like quantity of undistilled Water, (I speak with an If, because it is far more difficult to be exact in such nice Trials, than the unpractised will imagine) the difference was not considerable, being but one part in 400, and that difference is very small in comparison of that which Navigators and learned Authors relate to be observable in natural Waters, all of them good 〈◊〉 potable: I might tell you on this Occasion, that the last Great Duke of Tuscany, who was an Eminent Virtuoso, and the Patron of the celebrated Academy of the Lyncean Philosophers, is affirmed, among other prudent Courses that he took for his Health, whereof he was very Solicitous, to have constantly made use of distilled Water, when he used any Water, for his own Drinking. And I could add other things favourable enough to the Patentees Water, if Haste, and perhaps Discretion too, did not oblige me to leave them yet unmentioned, that I might now have time to say somewhat of the main thing of all that convinced me of the Saltlessness of the Water I speak of. I considered then, Sixthly, that the thing that was aimed at by those ingenious men, that at differing times, and in several Countries have attempted to make Sea-water sweet, and the thing that was required by proposing Recompenses, or otherwise to encourage the Makers of such Attempts, was to free the Sea-water from the Brackishness without any noxious Additament: so that on all sides it was taken for granted, that the only thing that kept the Sea-water from being safely Potable, was its Brackishness From which reflection it was natural for Me to infer a Conclusion very favourable to our prepared Water. For having long since written a short Discourse of the Saltness of the Sea; I had been in dustrious to devise ways of comparing Waters 〈…〉. And by these I found th● Patentees water to be more free from Common-salt, than Waters that are usually drunk here in London, of which I remember I shown those Gentlemen an experiment that surprised, as well as convinced them. And that which more satisfied me myself, was a Trial that I carefully made by a way which having mentioned, but not yet (for want of opportunity) disclosed to His Majesty, the Respect I own Him forbids me to impart without His leave: On which account I hope you'll be content to be at present assured of these two Things; One, that by this way of Trial, I found▪ (what possibly you will think strange;) that if there were in Water, so much as one Grain of Salt, in above two Ounces of Water, I could readily discover it: The other, that even by this critical Examen, I could not detect so much as a thousandth par● of Salt in Our Prepared Water; whereas I found by Trials purposely and carefully made, that ou● English Sea-water contained a 44, or 45th par● of good dry Salt; or, which is all one, that 44 Pints or near so many Pounds of Marine Water, woul● yield about one Pound of dry Common-Salt.  
Thus Sir, you have a short and Art-less Account such as my haste will permit, and the nature of th● Subject requires, of my part in promoting this profitable Invention; to which I own myself a grea● wellwisher, not out of any private Interest (th●● that was obligingly proffered me by the Patentees but as I think the bringing it into general us● may prove a real Service to Mankind, upon th● Score of divers Utilities and Advantages, which yet, (though I had leisure,) I should think very needless to enumerate to so discerning a Person as Dr. B. to whom I shall therefore hasten to subscribe myself,  
SIR, A very Affectionate Friend, and Humble Servant, R. boil.    

AFter so many forcible and convincing Testimonies in favour of this great Design, I shall make an Addition of the Approbation of His Majesty of Great Britain; who, after the publication of the first Impression, having seen the convincing Proofs of the healthful Quality of this Water, hath resolved to have the same to be made use of in all his Seaport Garrisons; The which he caused to be published by express Order, in several Gazettes, and particularly in that of Monday, Novemb. 5. 1683.  

An ABSTRACT out of the Gazette, Numb. 1676.  
HIS Majesty was pleased to Command the Honourable Mr. Boil to attend Him, 
White-Hall Novemb. 2. 1683.  to give His Majesty an Ocular Proof of the Nicety of his way of examining the freshness and saltness of Water, and to apply it to the Sea-Water, prepared according to the Patentees Invention; which being done before his Majesty, his Royal Highness, and the Duke of Grafton, several Persons of Quality being also present, it was made apparent, by a certain prepared Liquid which Mr. boil had brought with him, that a Discovery could be made if there were so much as a thousandth part of Salt in a proposed Water: By which Trial His Majesty, finding that the Prepared Sea-Water, for which he has granted his Royal Patent, was at least as free from Salt as the best Waters used in this Town: received such Satisfaction as to the wholsomness of the said Water, that He was pleased to declare his Royal Intentions both to encourage the said Invention, and to have the said Water made use of in his several Maritime Garrisons, which Nature has not furnished with wholesome Water.   

A Copy of a Letter from Captain Macdonnel, from aboard his Majesty's Ship the Greyhound, near the Coast of Spain, to one of the Patentees of Sea-Water.  
SIR,  
FOR these Four Months past, I kept your Sea-Water (for its better Trial) Buried in my Ships Hold, where, had it not been extraordinary good, it must infallibly have been of no use, and offensive, but I'll assure you it proved quite contrary; for yesterday, having several both of Sea and Land Officers on board of me, I made them insensibly taste of your Water, which I pretended to be from a Spring I watered my Ship at, Ten Leagues to the Southward of sally; they all affirmed it to be as good as Tangier Water, the very best counted in the straits, but when I discovered the Water to be yours, they hardly would give it Credit, and approved of it (as really it is, as good as can be drank) which they desired me to let you know.  
I am Your Humble Servant Novemb. 3. 1683.    

The Extremity of the last Winter having occasioned the loss of the Precedent, a Rich East-India Ship, and many other of His Majesty's Ships and Subjects to perish for want of Provision and Freshwater at Sea, His Majesty, for prevention of the like Misfortune, was pleased to Order the following Advice to be inserted in the Gazette of March 6. 1683.  

White-Hall, Feb. 28.  
HIS Majesty having heard several Relations of the great Distress some of his Subjects have lately been in at Sea for want of fresh Water, hath been pleased for their Relief in such Cases, to command the Patentees for the new Invention of making Sea-water Fresh, to give the most public notice they can of the Usefulness of the said Invention, of which his Majesty has received so great satisfaction, that his Majesty is pleased that those Instruments shall be provided for his Ships and Garrisons, where they are not naturally provided with good Water. And in obedience to His Majesty's Order, the Patentees do hereby give notice, That two Treatises have been written on this subject, which may be had at the Ship against the Royal Exchange, and at the Marine Coffee-house, whereunto all Persons are referred for more particular Information; in which the great benefit and many Conveniences of this Invention, the easiness, both as to the Trouble and Expense, of making the Salt. Water fresh, and the Wholsomness thereof, is clearly demonstrated by the Testimony of many Eminent Physicians. To which is added a Letter written by the Honourable Mr. boil, by which he assures the Whollomness, Durableness, and Sweetness of this Water. And a Letter from Captain Rand. Macdonnel, of the third of November 1683. from on Board the Greyhound Frigate, near the Coast of Spain; wherein he affirms, that he kept of the Patentees Water, some that was given him, in his Ships Hold, from his leaving England, being four Months, and then having several Officers on Board him, gave them a taste of it, pretending it to be of the Spring near Sally, where he had watered, and which is as good as the best in the straits, and they drank of it as such, till he discovered what it was; and then they approved of it to be as good as could be drank.   
FINIS.   

The Conditions upon which the Patentees for making Salt or Brackish Water Fresh and Wholesome, do intent to conclude with such Persons that shall please to agree with them for the Use of this Invention either by Sea or Land.  
FIRST, Every Person desiring to deal with the said Patentees, may have one Engine or more, with its Appendan●es, together with Directions how to manage and place the same, paying for each Engine and its Appendances, that will make about Ninety Gallons of Water fresh in Twenty four Hours, the Sum of Eighteen Pounds.  
Every one buying an Engine, is also to buy as much of the Ingredients for this Operation as will keep the same going at least six Months, at the Rate of one Shilling for as much as makes about ninety Gallons of Water.  
Every one dealing for an Engine, and the quantity of Ingredients aforesaid, is to enter into Covenants with the Patentees by Articles indented under Hand and Seal, as followeth; 
First, That he shall not sell or dispose of the said Engine or Ingredients, without Licence first had from the Patentees, under their Hands and Seals.  
Secondly, That he shall not use, nor suffer the said Engine or Ingredients to be used on Shore, without Licence from the Patentees, neither shall he directly or indirectly make, cause, or suffer to be made, any Engine in imitation of that of the Patentees, nor shall use any other Engine or Ingredients than what he shall buy of the Patentees, during the Grant of His Majesty to the said Patentees, without their Licence in Writing, under their Hands and Seals.  
Thirdly, That when he hath expended the Quantity of Ingredients first bought, he will from time to time buy a like Quantity from the said Patentees, which they will be obliged to afford at the like Rate.  
Fourthly, That he will pay unto the said Patentees, as a Praemium for their Invention of this Beneficial Art, six pence the Tun yearly, for the Tonnage of every Ship, in which they shall carry an Engine, the one Moiety in hand, on the delivery of the Engine, and the other at six Months after.  
Fifthly, If any one sells his Ship, or Interest in such Ship, and desires to be discharged of the aforementioned Covenants, bringing the Buyer, or some for him, to the Patentees Office, and procuring him or some for him to enter into Articles of the like tenor, his Articles shall be delivered up cancelled.   
If any one after the first Voyage shall not think it convenient to use the said Engine and Ingredients, returning to the Patentees, at the Office, their Engine and Appendances, with the Remainder of the Ingredients, not being damnified, he shall be discharged of the above Covenants, and repaid the Moiety of the Money first paid for the Engines and Appendances, and also one Moiety according to the quantity of Ingredients returned as above.  
If any Engine and Ingredients be used on Shore, the Praemium for each Engine shall be proportionably cheap, with respect to the advantages, the Parties agreeing with the Patentees may have by it, and they shall also covenant, not to use, or suffer to be used the said Engine and Ingredients on Shipboard, without Licence from the Patentees.  
Upon these Conditions, the Engine and Ingredients (which may be carried either by Sea or Land) together with the Directions for the Use thereof, shall be ready from and after the Twentieth day of August next, at the Patentees Office, kept in Lothbury, near the Royal Exchange, which will always be open from Ten of the Clock in the Morning till One. And all Persons who are willing to agree upon these Terms, may be pleased to subscribe their Names, or to order some one for them to accept of these Conditions, for which Books shall be always ready at the said Office in Lothbury, and at Mr. John Gandy's, at the Sign of the Ship over against the Royal Exchange.  
All the above Charges, together with the Price of Firing, and the Interest of the first cost of the Engine and its Appendances, as also the Praemium being duly computed, the Water notwithstanding will come under one half penny the Gallon, and the room which the Fuel takes up for Stowage, and the few Casks to be employed in the making and receiving this Prepared Water, will be less than the 
* Vid. Dr. Grew's Treatise, called New Experiments, fol. 14.  tenth part of the Stowage now employed for Water only.  
All Persons desirous to deal with the Patentees, whose Occasions will not permit them to come to London, shall have the Agreements which are to be signed, sent to such convenient Places as the said Parties shall desire, which they may communicate to the Patentees by Letters to their Office in Lothbury.  
All Parties who please to be further informed of the great Advantages they may receive by this Invention, (both as to Health and Profit) may have delivered to them two Treatises written on this Subject in most Languages now used, at the Patentees Office in Lothbury, or at the Ship in Cornhill, over against the Royal Exchange, London.   

July 2. 1684.  
THis Paper was agreed to, and ordered to be Printed and Published, by the Patentees, and others concerned.  


The Earl of Berkeley.  
Lord Viscount Falkland.  
R. Fitzgerald.  
Nat. Johnson.  
Theo. Oglethorpe.  
Tho. Maule.  
W. Bridgeman.  
P. Trant.  
George Doddington.