TT BANCROFT LIBRARY 0- THE LIBRARY OF THE UNIVERSITY OF CALIFORNIA OF TRINITY MINING COMPANY, OF TRINITY MINING COMPANY, GALENA, Lander Co, NEVADA. 100,000 SHARES-Par Value $25.00. Office, JJo. 61 (Broadway, ((Room 4^^) JJew York. J. G. COOPER, President, and Superintendent at Mines B. A. OXNARD, Vice-President, D. B. HORTON, Secretary. H. M. FRANCIS, Treasurer, JOHN P. ADAMS, Counsel, 194 BROADWAY. IDIUr^E OTO :EH.S- J. G. COOPER, GALENA, Nevada. B. A. OXNARD, Sugar Refinery, cor. Dock and Water Streets, Brooklyn, N. Y. D. B. HORTON, WELLS FARGO & Co., 65 Broadway. H. M. FRANCIS, Cashier, do. do. REGINALD G. BARCLAY, BARCLAY & Co., 14 and 1 6 Beaver Street. OTTO WITTE, HAGEN & BILLING, No. i Wall Street. ALEXANDER BARRY, 14 and 16 Beaver St., N. Y. City. Office of TRINITY MINING CO., No. 61 BROADWAY, Room 49. Your attention is called to the following reports and statements, in full confidence that a very remunerative investment in well developed, constantly paying property is offered. It is very advantageously situated. A large concentrating mill, embodying all latest imprcvements, is now building by the Montrose Mining Company, within half a mile of these mines , and (( smelters } ' are soon to be erected at the railroad. *The JVevada Central (Railroad, recently completed, has opened up a large supply of excellent wood and timber, and will greatly reduce the cost of supplies and mining expenses. The Company own valuable mill sites, water rights , and ample buildings for dwellings, shops, stables, &c., and tramways, cars, loading pockets and roads are already constructed. (Best prices can be obtained for ores, as those already shipped are much sought for, the ores being rich in lead, easily worked, and valuable for their fluxing qualities. A shipment during January, 1880, of 80 tons, from these mines brought in Salt Lake about $300 per ton, the full value, as they enabled the smelters to work a large quantity of low grade ores poor in lead. The mines are now in condition to furnish fifty tons of ore daily, which will enable the Company to pay hand= some monthly dividends. They are of great extent, and will pay for a long time, before great depth or rmich water is encountered. The treasury shares now offered are to be sold as a working capital, and to erect tlie proper machinery for the reduction of the ores. Mills can be built and mines put on a dividend paying basis by June- next. It is confidently submitted that no more surely paying investment is. attainable. NEW YORK, December isf, 1879. To the Stockholders of the Trinity Mining Co. : The following- communications relating to the property of the Trinity Mining Company, have been received, and are furnished for your information: BATTLE MOUNTAIN,. November loth, 1879. ' JAMES G. COOPER, Esq., President Trinity Mining Cmnpuny : SlR: In accordance with your instructions, I have visited! and examined the mineral properties known as the " Trinity " and " Butte " Silver Mines. These mines are situated in the immediate neighborhood of Galena, in Battle Mountain Min- ing District, Lander County, Nevada. Galena is distant 14 miles from Battle Mountain Station on the Central Pacific Railway, with which it is connected by a good wagon road. The mines are at an altitude of about 6,000 feet above the sea, and about 1,500 feet above Reese River Valley. The climate is temperate, and work can be carried on uninterrupt- edly throughout the year. The country is entirely devoid of timber, the only vegetation in the neighborhood being sage brush. Mining timber and lumber can be obtained from the mills at Truckee, and delivered at Galena for about $30 per thousand. Cord- wood for fuel costs $10 per cord de- livered in quantity. Preferable for fuel, however, is Wyo- ming coal, which is delivered at the mines for $20 per ton. THE TRINITY MINE. The claim consists of 1,000 feet by 300 feet, located on the Trinity Ledge. This is a large and well denned mineral vein, which has been traced for a long distance on the surface, in many places out-cropping boldly. Its course is North and South, and its dip vertical. The average width as shown in workings is about six feet. The vein is contained between well-defined walls with clay selvages, and showing unmistakeable evidences of permanency and strength. The country rock is Grey-wacke. The ore consists of Argentiferous Galena and the products of its decomposition, these being oxides and carbonates of lead rich in silver As greater depth is attained the proportion of undecomposed Galena will probably increase. The ore is distributed throughout the vein in pay streaks and bunches, these varying in assay value, occasionally being as high as $300 per ton. The principal workings on the vein consist of two adit tun- nels run in on the course of the vein. The lower of these is about 500 feet in length ; at this distance it is connected with the surface by a shaft 200 feet in depth. 300 feet from its mouth it is connected with the upper tunnel by a winze 100 teet in depth. The upper tunnel is 125 feet in length, its end being connected with the surface by an up-raise of 40 feet. Below the level of the lower tunnel, water is met with, and in sinking it will be necessary to provide for pumping* This water can be kept under control by a small steam pump or hoisted in a water bucket for the next 200 or 300 feet. I carefully sampled the mine at different points, with a view of ascertaining the value of the ore. These samples were submitted to fire assay and with the following results : No. i. An average across the face of the south drift from bottom of the winze. This yielded per ton of 2000 Ibs., Silver $37.90 Gold. . , ... 6.0Q Total $439 No. 2 was taken from the bottom of the winze, at a point where a new ore body appears. This yielded, Silver $79.59 Gold 3- Total t* $ 82 -59 No. 3 was taken from the upper workings of the mine, where a body of low "grade ore, capable of concentration, 24 inches wide, was left after stoping out the higher grade. This gave by assay, Silver $62.53 Gold 3- Total : $65.53 No. 4. In the north drift from the bottom oi the winze there are two streaks of ore, each about 8 inches wide. An average sample of these gave, Silver $63.40 Gold 7-5 Total $70.90 No. 5. In the lower tunnel an 18 inch streak gave y Silver $26.53 Gold 3-oo Total -$29.53 No. 6. An average sample of the second class ore on the dump, gave, Silver $75-. 5 8 Gold ........ . . 3.00 Total , ...$78.58 No. 7. An average sample of the first class ore on the dump-, gave, Silver $132. 65" Gold 7.. 5.0 Total.. $140.15; It is my opinion that when properly developed and stoping 1 ground opened up, the mine will be capable of furnishing a large body of excellent ore for concentration, and also a remunerative quantity of first-class ore ready for shipment to the smelter without further treatment at the mine. THE BUTTE MINE. This claim is also 1,000 feet in length by 300 feet in width. The Jedge is a strong, well-defined fissure vein in the same country rock as the Trinity, from which it is distant about one mile. The general course is N. 30 E. magnetic. It dips 50 to the northwest ; its width, as far as displayed, varies from two feet to over fifteen feet. The hanging wall is very clearly defined throughout the workings. The vein matter is very similar to that of the Trinity, ex- cepting that the decomposition of the ore has been carried to a greater extent. The mine has been opened by an adit tunnel 430 feet in length. Above this tunnel the ore has been stoped out to the surface, a distance at the tunnel heading of over 200 feet. Below the tunnel level two winzes have been sunk to a depth of about forty-five feet ; only one of them, the most south- erly, was accessible at the date of my visit. Thus far no water has been met with at the mine. I took samples of the vein matter with the following re- sults : No. i. Screenings from the upper stopes. The Superin- tendept estimates that there are about 500 tons of this material lying loose in the stopes. Samples taken at ran- dom and mixed yielded, Silver $56.85 Gold 4. 5 o Total $61.35 No. 2. An average from the first class ore on the dump, Silver $151.65 Gold 18.00 Total $169.65 8 No. 3. An average sample taken from the face of the north drift from the winze, the ore streak being 24 inches wide, gave, Silver $17.01 Gold 7. 50 Total $24.51 No. 4. An average across ten feet of vein matter in the roof of the adit, capable of concentration, gave, Silver $3-79 Gold 3.00 Total $6.79 i No. 5. An average from stope in south drift from winze ore streak 12 inches wide, heavy mineral, Silver $155.44 Gold 4. 50 To:al $ 1 60. 94 It will not require a great deal of work to open up this mine below the tunnel level so as to put it in a condition to furnish a large quantity of ore of a very good class. It will be seen from the results of the preceding examination that a very good grade of ore is furnished by both mines. The average percentage of lead in the heavy pay streaks will be about 40/0. Concentration will increase this two-fold. The lower grade will be benefitted of course in a still greater degree of concentration. There is every reason to believe that under proper man- agement the Trinity and Butte Mines will be a remunerative investment to the owners. They are in my opinion second to no other property in the Galena Distript. Very truly yours, (Signed) D. ERNEST MELLISS, Mining Engineer. GALENA, NEV., Dec. jilt, 1879. H. M. FRANCIS, Esq., Treasurer Trinity Mining Company, New York City. SIR : As requested, I have made examination of Title and Property of the Trinity and Butte Mining properties, and give you herein the results of my investigation. Title and Past History. The Title is a Sheriff's, dating back seven or eight years during which time it has been worked to a profit by the owner, J. A. Blossom. The Trinity Mine is situated in Battle Mountain District, Lander Co., Nevada, 14 miles from the C. P. R.R. Station of Battle Mountain, and 6 miles from the Central Nevada Railroad, (Narrow Gauge) ; good roads and light grade ; water limited at present, and no fuel in the district, but the railroad destroys this last objection. Supplies and 'labor gotten correspondingly cheap on account of proximity to railroad. Country Rock. This mine is a true fissure vein in slate, grey-wacke and limestone (similar to the Hartz mountains in Germany and Guanajuato, in Mexico, where are the oldest and best mines in the world). Character of Ores. Carbonates of lead, galena, sulphides of silver, chlorides of silver, and a little gold. The ore of this mine has averaged $130 or more, but large bodies of $40 to $60 ores have been left, together with higher grades, above the tunnel. Plan of zvork done- 10 or 600 x 200 -i- 2 = 60,000 x 8 width = 480,000 cubic feet -j- 12 = 40,000 tons of vein matter r Now extracted and on the dumps, 20,000 " Remaining in the mine, 20,000 tons. one-half of which is good ore, or 10,000 tons worth $60 minimum __ $600,000 Below the tunnel we have a right to estimate 50 % of what we can see as a reasonable probability, or 3,00,000 more. We still have 400 feet of ground to explore to the north (claim is 1,000 feet in length) r so I would safely estimate on i ,000,000 of ore in sight. Plan of Reduction. There is shipping ore in sight, and much to be concentrated. The Tailings can be panned at some future day, if they contain gold or chlorides. I will send you a special paper covering this subject, after my investigation? into the Butte property. Having had a varied practical experience of fourteen years, my opinion of the Trinity Mine has been formed after a care- ful examination for the past six months. Yours truly, (Signed) C. B. DAHLGKEN, Machinist and Mining Engineer* GALENA, Dec: $ot/i,. 1879. J. G. COOPER, ESQ., President Trinity Mining Co., Galena, Nevada. DEAR SIR, Repeated visits to the Butte and Trinity Mines,. and the nature of my business as an Assayer and Mining Engineer have given me many opportunities to- learn facts and make observations concerning both of these mines. In the following remarks please find some of these observations- and facts, also some of the conclusions I was enabled to draw from a knowledge of these facts and observations. II The Trinity Mine is located on an extensive mineral belt, which runs in a northerly and southerly direction, and which can be traced for miles north and south from your claim. The mineral deposits in this belt, which in its course cuts through different changes of country rock, show all the char- acteristics of a true fissure vein or system of veins, promising a permanent production of high grade ores. The average width of the vein I should judge at about five feet ; the ore in the vein occurs in a pay streak of from four to eighteen inches in width, forming lodes of concentrated ore of con- siderable longitudinal and vertical dimensions, accompanied with vein matters, and mixed ore, the whole making up an average width of about five feet. The character of the ore as far as I have been able to ob- serve, is an argentiferous galena with its different products of decomposition, containing half ounce of gold from 70 to 200, and in extreme cases to 600 ounces of silver per ton, when containing 60% of lead. Iron pyrites, arsenical iron, blende and copper pyrites are present, but none of these minerals are rich in silver and goldi, yielding when concentrated, not over $25 per ton in both* metals. I have not been able to detect any other silver ores, and therefore I think the mine will produce at greater depth smelting ores exclusively, the milling ores as products of natural decomposition of the galena being confined to ores near the surface. From the openings of the mine in 1 869, considerable first- class ore was obtained, and the first shipment made in the beginning of 1870, consisted in ore of ^% lead and $180 in silver per ton. Since then the mine has been worked period- ically, and a considerable amount of ore been shipped, contain- ing from 50 to 60% lead, and from $120 to $225 in silver per ton. The second-class ores have been left on the dumps, and are mixed with vein matter and poor ores. The sixty tons worked here averaged about $40 per ton, and yielded 90$ of their assay value by chloridizing roasting, and leaching. They consisted in products of decomposition of galena and other sulphates exclusively. 12 The present lower tunnel will give a good opportunity to ascertain by cross-cutting- the size and character of the vein or system of veins, as they occur in the limits of your claim. The adoption of a plan for future lower works will depend upon these explorations. In the meantime the whole of the vein and its branches could be stoped out above the tunnel level without interfering in the least with future operations. This would furnish a large amount of mostly second-class ore r which I should judge will average from $25 to $30 per ton in silver, and leave a net profit of from $7 to $10 above run- ning, concentration and smelting expenses. The amount of these reserves above the tunnel level I would place at from 4,000 to 5,000 tons. Considering the size of the vein and its ore-bearing char- acter, as developed in the upper works, I should place the permanent production of the mine, when properly opened, at from 20 to 25 tons of ore daily, of a value of $30 per ton, resulting in a daily net yield of from $200 to $250. In this estimate I do not include the not improbable chance of meeting large lodes of concentrated ore. which of course might increase the amount of the net product to any multiple of the figures given. The Butte Mine is located on a parallel belt east of the Trinity belt. It is equally prominent and can be traced for miles north and south of your claim. There are evidently different ore channels existing in this belt, the width of which is from 150 to 200 feet on the Butte Hill where your claim is located. Since 1870 but very little work has been done ; enough, however, to leave no doubt about the char- acter of the vein or veins inclosed in this belt, and which have to be classed as true fissure veins. There is more or less lead in all the Butte ores, either as galena or its products of decomposition ; but their principle value consists in the silver ores, chloride and sulphates of silver which they contain, and the character of the ore might be described as milling ore. The critical- point in mines of this character, that is the line where the chloride surface ores change into sulphurets, has been reached and passed. It was encountered first in the north incline 140 feet below the surface and then followed for 1 60 feet deeper. In the south winze the line of contact has been reached but hardly passed, showing that the line of contact between chlorides and sulphurets conforms with the configuration of the surface ground. In both instances it has been demonstrated that the sulphuret ores correspond in their richness with the chlorides found nearer to the surface. The average of the Butte ores is about $40 per ton and $3 gold. The first class ores yield from $100 to $1,500 in silver per ton and are found in seams of from two to ten inches in width. The original owners of the claim in 1869, realized from 265 tons $50,544. Their successors, the Nevada Butte Silver Mining Co., mined and milled about 1,500 tons, of an average assay value of $40 per ton. These opera- tions proved, however, a financial failure, caused by the method employed for working these ores. Using simple pan amalgamations, the resulting bullion ran as low as 35 fine in silver was in fact lead bullion containing from $1,500 to $2,000 in silver per ton, to obtain which, for each ton of bul- lion from five to six tons of quicksilver had to be used. In 1878 I had a lot of about 34 tons, averaging from $70 to $80 per ton in silver worked here by chloridizing roasting, and leaching with entirely satisfactory results, as I received go% of the assay value of the ore. All the present works of the Butte mine are located on the western branch, or on the hanging wall of ihe Butte belt, showing' a view of from two to three feet in width. Future developments will have to decide what ore bodies exist to the east up to the foot wall of the belt. So far surface indi- cations are the only guide for this question but judging from these, the chances of meeting branches of large size and equally as rich are very favorable. There is a considerable amount of chloride standing in the southern part of the mine, amounting probably to almost 2,000 tons, and of an average value of $40.00 per ton. It can be extracted by the means of the south shute without inter- ferencs with any plan which might be adopted for the open- H ing- of lower works. There is also about 400 tor:G of ore on .the dumps of an average value of $30.00 per ton. Considering the size and ore-bearing character of the vein as developed, I should judge that if once properly opened, a permanent value of from 15 to 20 tons per day can be ex- pected, of an average yield of $40 per ton, giving a net return of from $300 to $400 per day. The mineralogical character of the Trinity and Butte ore being so different, different methods will have to be adopted for their working. Concentration and subsequent smelting will eventually be the only method adopted for the Trinity ores, although there is yet to be expected from the upper works of this mine a considerable amount of chloride ores which could be worked to greater advantage* by chloridizing roasting-, and subsequent leaching. The Butte ore belongs entirely to this latter class, and roasting and leaching are for these ores the proper treatment. There is one peculiarity to mention about the Butte, as well as the chloride ores of the Trinity mine ; that is, the large percentage of silver which can be extracted by leaching without previously roasting these ores. I have made frequent trials and found that some of these ores are often naturally chloridized to such an extent that from 60% to 80^ of the contents in silver can be extracted at once by leaching. Of course to secure satisfactory results in all cases it is advisable to subject these ores to a chloridizing roasting ; their partial natural chlorination will, however, allow a considerable re- duction in the amount of salt to be used in roasting, and the time required for roasting. Very respectfully, JOHN RAMDOHR. GALENA, Nevada, Jan. 4, 1880. H. M. FRANCIS, Esq., Treasurer Trinity Mining Co., New York. DEAR SIR, I have visited the Trinity and Butte Mines, belonging to the Trinity Mining Company, and was ex- tremely gratified as a stockholder to find that we have in them such large bodies of easily mined rich concentrating ores. The Trinity, the larger of the two properties, is a true fissure vein, the width of which has never been obtained by cross-cutting. The ore consists mainly of galena, carbonate of lead, half decomposed sulphides of lead and iron pyrites, all of them bearing more or less silver. They all exist in large quantities, there being already in sight enough to take out fifty tons per day for nearly one year, although as yet the average depth attained is not 1 50 feet. There is every reason to believe that the mine will improve in depth. There is at present an adit driven into the side of the hill, by which the ore can be taken out without any expense for hoisting. Another could be driven at the bottom of the hill, 150 feet lower, by which the hoisting of the ore could be fur- ther postponed for a long time. I carefully selected average samples of the different classes of ore and had them assayed, with the following result per ton: Silver. Gold. Total. Carbonates, $106 12 $24 oo $130 12 Pyrites and Lead. - 175 75 25 oo Half Decomposed Galena, 46 23 3 oo 49 23 Galena, - * - - 100 43 7 50 107 93 The galena is the ore which rather preponderates in the mine, and I should consider it safe to say that the average of the ore in the mine would go $80 per ton. The vein in the Butte Mine is considerably smaller, not being more than four or five feet wide, but I am informed that very rich chloride ores are found in it. There are none of those rich ores in sight, as they have been " gouged " out by the parties who owned the mine before we did. When i6 the mine is further opened up, our Superintendent expects to strike more of these rich ores which go*several hundred dollars to the ton. All the lower grade concentrating ore has been left, and a large amount of this is immediately avail- able. This class consists mainly of a mixture of carbonates and sulphides of lead. I took three average samples from the mine, and had them assayed, with the following result : Silver. Gold. Total. No. i, $41 69 $12 oo $53 69 No. 2, - 60 64 9 oc 69 64 No. 3, 37 90 3 oo 40 90 I should say that 25 to 30 tons of this ore could be taken out daily. This property comes with its excellent sites for concentrating mills. To sum up my impressions, I think we have here mines, which properly managed, will give us returns far beyond our expectations. I have consulted with disinterested parties here who have visited these mines, and they all unite in speaking most favorably of them. Truly yours, (Signed) B. A. OXNARD. Mr. Oxnard's assertions, I as a practical mining engineer of fifteen years' experience, consider as very conservative, and time will fully verify them. (Signed) C. B. DAHLGREN. GALENA, Jan. tfh, 1880, Manufactured by YLORD BROS. Inc. Syracuse, N.Y. Stockton, Calif.