Volume 24 (1872) (424 pages)

May 11, 1872.] SCIENTIFIC PRESS. 303 POWER, TAINTER & CO., MANTPACTURERS OF WOOD-WORKING ,MACHINERY, 3063 Chestnnt street (West end Chestnat street Bridge) PHILADELYSiA, #7 Woodworth Planers a Specialty. 2v23-ly BLAKE’S PATENT STEAM PUMP. From the Report of the Committee on Steam Pumps, at the Soventh Industrial Exhibition of the Mechanics’ Institute, San Francisco : BLAKE'S STEAM PUMP.—Thia Pump yielded the beet reanita as ta the quantity of water discharged as compared wiih ita measured capacity. The vaives are of brass, and well arranged, Th. il arranged for opcraiing tha pnmps, cither fast or slow. a het oars We recominend that a Medal bo awarded to it, as THE BEST STEAM PUMP. (Awarded a Su.ven Mepat, the first premium.) Signed) JAS. SPIERS, : WM. H. BIRCH. From the Report of the Committee on Steam Pumps, at the Eighth (or last) Industrial Exhibition of the Mechanics’ Institute, San Francisco : BLAKE'S MINING PUMP,—This ie an exceilent Pump, well made, and giveo a high per cent. of dnty. We McAFEE, SPIERS & CO., BOILER MAKERS AND GENERAL MACHINISTS, Howard st, between Fremont and Reale, fan Franolaco. CALDWGLIVs Improved Stop Governor, Manufactured at the CYCLOPS MACHINE WORKS, 113 and [15 Beale strect, Sun Francisco, Sv24-311 WM, CALDWELL. BROWN’S PATENT LAMP. Z 4 ~ y = 8) r S & J 5 = & tn ¢ ‘i 5 a oj ic} & } % 2 a 3 5 : y 2 n R 4 > 0 ia io C fc & 5 i “ One of theso Lampe, when placed at a distanco of 200 feet from the hank, will light up a hank eurface 250 feet in length and 160 fect high, and toa much hetter advantage thon any other light heretofore tried, and at an expenso not to cxceed tivo cente per hour, Lampe furnished at short notice. For furiher particulars addreas c. B. BROWN, Tv24-t Piucerville, Cal. Varney’s Patent Amalgamator. Theae Machtnes Stanc Unrtvaled. ~ For rapidity pulverizing and amalgamating ores, they havo no equal. Noeffort has heen, or will be spared, to have them constructed in ihe most perfect manner, and of the great nnmber now in operation, not one hae eyor required repaira. The constant and increasing demand for them issufficient evidenco of their merits. They are constructed eo as to apply steam directly into tho pulp, or with steam boitome, as desired. This Amalgamator Operates as Follows: The pan being fillcd, the motion of the muller forces the pulp to the center, where it ie drawn down through tho apperture and between the grinding surfaces,— Thence itisthrown tothe periphery into the quicksilver, The curved platee again draw it to the conter, where it paasee down, and to the circumference as hefore, Thus it is constantly passing aregular flow hetween the grinding surfaces and inio the quicksilver, until the ore ie reduced to an impalpable powdcr, ond the metal amalgamated. Setlers made on tho same principio excel all othera They hring the pulp so constantly and perfectly in contact with quicksilver, that the particles are rapidly and completely aheorhed, Mill-menare invited to examinethese pans ond setlers for themselves, at thooffice, 229 Fremont Strect, San Francisco, NELSON & DOBLE, AOENTS FOR Firth & Sons’ Cast Steel. MANUFACTURERS OF Hammers, Stone Cutters’, Black amithe’ and Horse-Shoera’ Tools, 13 and15 Ton Yen eT ee Rew Market, San Francla ar Bledges, SHEET IRON PIPE. TILE Risdon Iron and Locomotive Works Corner Howard and Beale Streets, Are prepared to mako SHEET IRON AND ASPHALTUM PIPE, of any size and for any pressure, and contract to lay the same where wanted, guaranteeing o perfect working pipe with tho least amount of maierial. All kinds of OAR WHEELS, AXLES and RAILROAD WORK made to order. Standard sizes of Wheele constantly on hand. Wheels hored and pressed on, Axles turned, etc., at Reasonable Rates. we All kinds of Machinery made and repaired. 24y22-30 JOSEPH MOORE, Superintendent. J. M. STOCKMAN, Manufacturer of PATTERNS AND, MODELS, (Over W. T. Garratt’s Brass Foundry). N.W. corner Natoma and Fremont strests, 8. F. En trance on Natoma street, 6v23-3m da Diploma for thie Pump. wou hy tho Commities.} 0. W. DICKIE, H. B. ANGEL, W, EPPELSHEIMER, MELLVILLE ATWOOD. (No other Steam Pump received other than a Diploma or honorable mention at the LAST Mechanics’ Exhibition, al! other assertions to the contra notwithstanding. Hooker's Hand Pump was the only Pump, of any kind whatsoever, that received a MEDAL and FIRST PREMIUM (highest award to pumps) at the /ast Exhibition, for which wo are also selling agents.—See oficial Report of the above Committee.) CHAS. R. STEIGER, Tho trial of Steam Pumps at tho Eighth Industriai Fair in San Francisco, by a committeo of fyo of the most thoronghly practicai mechanics on ihi~ coast (as abovo namicd), showed that the Blake Pump guve 8G per cent. of ntilized power, whilo othere gave but 60 por cent., showing great difference in economy. The Blake Pump ts the ONLY Steam Pump that EVER RECEIVED A SILVER MEDAL at any Exhtbilion of dhe Mechanics’ Institute ever Acid in San Francisce or California. RIA completo etock of ali sizes constantly on hand at the Machinory Warehouse of the Agente, TREADWELEL & CO., Market street, corner of Fremont, San Francisco. KNOWLES’ PATENT STEAM PUMP. THE TRUTH! A. L. FISH, Agent Knowles’ Steam Pump—Dear Sir: In answer to your inquiries, we state that the highest award for Steam Pumps at the Eighth or last Mechanics’ Fair in San Francisco, was a First Premium and Diploma, awarded to the Knowles’ Patent Steam Pump, as published in the Official List September 23d, 1871. A. 8. HALLIDIE, President Board of Managers. W. H. Wiuniams, Sec’y Board of Managers Eighth Industrial Exhibition, M. I. 12y3-awbp It has no Cranks or Fly-Wheel, and has no dead points where it will stop, consequently it is always ready to start without using a starting-bar, and does not require hand-work to get it pak the center. Will always start when the steam cylinder is filled with cold water of conensation. The trial of Steam Pumps at the Eighth Industrial Fair in San Francisco, by a Committee of Five of the most thoroughly practical mechanics on this coast, showed the Knowles Pump to lose but 11% per cent., while others lost as high as 40 per cent., showing great difference in economy. WE BUILD AND HAVE CONSTANTLY ON HAND THE LARCEST STOCK OF PUMPS IN THE WORLD, And for Eyery Conceivable Purpose. A. L. FISH, Agent. No 9 First Street, San Francisco, Cal. P. §.—All kinds of new and second-hand Machines on hand. 3v24-eow-bp Metallurgy and Ores. RODGERS, MEYER & CO., COMMISSION MERCHANTS, ADVANCES MADE Onall kinds of Ores, and parttcutar attenttor PAID TO CONSIGNMENTS OF GOODS, 4v16-3m LOUIS FALKENAU, STATE ASSAYER, Analytical and Consulting Chemist, 421 Montgomery St. up statra, Particular aitention given to the Analysis of Ores Minerals, Metailurgleal Produdts, Mineral Waters, Soils, Commercial Articles, Etc. One ortwo pupile can receivo theoreiical and practicalinvstruction in Assaying, Analyeie, or any particular branch of Chemistry at the laboratory. liv213w LEOPOLD KUH, (Formerly of the U, S. Brench Mint, 8. F.} Assayer and Metallurgica? CHEMIST, No. OL1 Commerctal Street, (Opposite the U.8. Branch Mint, San Franoisco, Can, Tv2l-3m J. W. THURMAN, (Successor to S. W. Howland & Co.,) ORE CRUSHERS AND SAMPLERS, Nos. 413 and 415 Mission Street, SAN FRANCISCO. Particular attention paid to Ores received on consignment ALL ORDERS EXECUTED AT THE OHORTEST NOTICE, 5y24-6m, CALIFORNIA ASSAY OFFICE No. 612 CALIFORNIA STREET, One Door West of Montgomery.....SAN FRANCISOO, J. A. MARS, Assayer. aa” Analysis of Ores, Mineral Waters, ete, 1Ov2e Richardson & Co., Copper Ore Wharves, SWANSEA. _ RicHaRnson & Co. have been for thirty years estabiished in Swansea us Agents for Ure peer erating anipling, Assay~ ing, and Sale of Oopper, Silver, Gold. Lead, Zinc, and all other Ores and Metals, for which they have extensive Warehousos and Wharves under cover, 1,000 feet of Quay Frontage within the Floating Dock, and the most complote Machinery and Appliances. They aro also prepared to make advances against Ores in anticipation of realization, and to guarantee all paymouts when required. Tiv2i-ly G. W. 6TRONG, W. L. 6TRONG G. W. STRONG & CO., Metallurgical Works, No. 10 Steveneon Strect, near First, Sawn Franoisco Wo purchase Ores, Bullion, ete. Ores worked and Teste made with care. Also, Assays of Gold, Silver, Copper, Lead, Tin and other Metale. 23722 . PLATINUM Vessels, Apparatus, Sheet, Wire, Etc. Etc. For all Lahoratory and Manufacturing Purposes M RAYNOR, 25 Bond street, ‘New York. Platinum Scrap and Ore purchased. 22v18 JOHN TAYLOR & CO., IMPORTERS OF AND DEALERS IN ASSAYERS’ MATERIALS, Chemical Apparatus and Chemicals, Druggists’ Glassware and Sundries, PHOTOGRAPHIC GOODS, ETC., 612 ‘and 614 Washington street, SAN FRANCISCO. We would call the epecial attention of Assayers, Chemiste, Mining Companies, Milling Cotmpanles, BLAKE’S PATENT STEAM PUMP. From the Report of the Committee on Steam Pumps, at tho Seventh Industrial Exhibition of the Mechanics’ Institute, Son Francieca BLAKE'S STEAM PUMP.—Thie Pump yielded the hest resulte as to the quantity of water discharged as comparcd with its measured capacity. ‘tho valves are of hrase, und well arranged, The steam yalvee ore well arranged for operating tho pumps, either fust or slow. We recommend that a Medal he awarded to it, as THE BEST STEAM PUMP. ILVEn MEDAL, the first premium.j (Signed) 8 SPIERS, WM. H. BIRCH, the Report of the Committee on Steam Pumps, at the Eighth (or Jast) Industrial Exhihition of the San Francisco : BLAKE'S MINING PUMP.—This is an excellcnt Pump, well made, and gives a high per cent. of duty. We recommend a Diploma for this Pump. (Signed by the Committee.) G. W. DICKIE, H. B. ANGEL, OHAS. R, STEIGER, ‘W. EPPELSHEIMER, MELVILLE ATWOOD. {No other Steam Pump received other than a Diploma or honorahle mention at the LAST Mechanics’ Exhihition, all other assertions to the contrary notwithstanding. Hooker's Hand Pump was the only Pump of any kind whatsoever, that received a MEDAL and FIRST PREMIUM (highest oward to pumpe) at the last Exhihition, for which we are also solling agente.—See official Report of the abeve Commitice.] The trial of Steam Pumpe at the Eighth Industrial Fair in San Francisco, hy a committco of five of the most thoroughly practical mechanice on thie coust (as ahoye named), showed that the Blake Pump gave 86 per cent. oj utilized power, while others gavo hut 60 per cent., showing great difference in economy. The Blake Pump is the ONLY Steam Pump that EVER RECEIVED A SILVER MEDAL at any Exhibition of the Mechanics’ Institute ever held in San Francisco or California R@ A completo stock of all sizes constantly on hand at the Machinery Warehouse of the Agents, TREADWELL & CO., Market Street, corner of Fremont, San Francisco. (Awarded a JAS. From h Me 7 ip ‘e, etc., to our large and well adapted stock of ASSAYERS’ MATERIALS —AND— Chemical Apparatus, Having heen engaged in furnishing these supplies since the first discovery of mines on tho Pacific Coast, WE ENUMERATE 1N PART: Assay Balances—L. Oertlings, London. Assay Balances—Becker & Sone, Antwerp. Chemical Balancee—Becker & Sons, Antwerp. Ore or Pulp Balances—Becker & Sons, Antwerp, Assay Weights—Graine and Grammes. Bullion Balancee and Weights. Humid Assay Apparatus. Iron Furnaces—lmproved, Lined with Fire Brick for Cupeliing and Melting. Tonge, Muifles, Cupcl Moulds, Assay Moulds, Scorifiers, Roasting Dishes, Annealing Cups, French Clay, Assay Crucihles, Hessian for Sand) Crucihles. Dixon's Celebrated Black Lead Crucihles aud Covere— all sizee. Assayers’ and Chemical Glasswaro and Assayers’ Hardware—a full assortment. Steel Stamps for haie cut to order. ACIDS AND CHEMICALS. Acid in carhoys and hottles, commercially and chemi cally pure. Bi Carh. Soda, Borax, Bone Ashes, Litharee. Assay Lead in hars, rolled and granulated. Black Oxide Manganese, Sodium and Sodium Amalgam, Sulphate of Copper, Quicksilver, and all Chemicaly and Reagents required hy Assayere and Milling Co.'s, fa” Our Gold and Silver Tahles, showing the value per ounce Troy at different degrees of fineness, and valnahle tahles for computation of assays in Graius and Grammes, will he sent upon application, 24v23-tf JOHN TAYLOR & CO,

May 11, 1872.] SCIENTIFIC PRESS. 303 POWER, TAINTER & CO., MANTPACTURERS OF WOOD-WORKING ,MACHINERY, 3063 Chestnnt street (West end Chestnat street Bridge) PHILADELYSiA, #7 Woodworth Planers a Specialty. 2v23-ly BLAKE’S PATENT STEAM PUMP. From the Report of the Committee on Steam Pumps, at the Soventh Industrial Exhibition of the Mechanics’ Institute, San Francisco : BLAKE'S STEAM PUMP.—Thia Pump yielded the beet reanita as ta the quantity of water discharged as compared wiih ita measured capacity. The vaives are of brass, and well arranged, Th. il arranged for opcraiing tha pnmps, cither fast or slow. a het oars We recominend that a Medal bo awarded to it, as THE BEST STEAM PUMP. (Awarded a Su.ven Mepat, the first premium.) Signed) JAS. SPIERS, : WM. H. BIRCH. From the Report of the Committee on Steam Pumps, at the Eighth (or last) Industrial Exhibition of the Mechanics’ Institute, San Francisco : BLAKE'S MINING PUMP,—This ie an exceilent Pump, well made, and giveo a high per cent. of dnty. We McAFEE, SPIERS & CO., BOILER MAKERS AND GENERAL MACHINISTS, Howard st, between Fremont and Reale, fan Franolaco. CALDWGLIVs Improved Stop Governor, Manufactured at the CYCLOPS MACHINE WORKS, 113 and [15 Beale strect, Sun Francisco, Sv24-311 WM, CALDWELL. BROWN’S PATENT LAMP. Z 4 ~ y = 8) r S & J 5 = & tn ¢ ‘i 5 a oj ic} & } % 2 a 3 5 : y 2 n R 4 > 0 ia io C fc & 5 i “ One of theso Lampe, when placed at a distanco of 200 feet from the hank, will light up a hank eurface 250 feet in length and 160 fect high, and toa much hetter advantage thon any other light heretofore tried, and at an expenso not to cxceed tivo cente per hour, Lampe furnished at short notice. For furiher particulars addreas c. B. BROWN, Tv24-t Piucerville, Cal. Varney’s Patent Amalgamator. Theae Machtnes Stanc Unrtvaled. ~ For rapidity pulverizing and amalgamating ores, they havo no equal. Noeffort has heen, or will be spared, to have them constructed in ihe most perfect manner, and of the great nnmber now in operation, not one hae eyor required repaira. The constant and increasing demand for them issufficient evidenco of their merits. They are constructed eo as to apply steam directly into tho pulp, or with steam boitome, as desired. This Amalgamator Operates as Follows: The pan being fillcd, the motion of the muller forces the pulp to the center, where it ie drawn down through tho apperture and between the grinding surfaces,— Thence itisthrown tothe periphery into the quicksilver, The curved platee again draw it to the conter, where it paasee down, and to the circumference as hefore, Thus it is constantly passing aregular flow hetween the grinding surfaces and inio the quicksilver, until the ore ie reduced to an impalpable powdcr, ond the metal amalgamated. Setlers made on tho same principio excel all othera They hring the pulp so constantly and perfectly in contact with quicksilver, that the particles are rapidly and completely aheorhed, Mill-menare invited to examinethese pans ond setlers for themselves, at thooffice, 229 Fremont Strect, San Francisco, NELSON & DOBLE, AOENTS FOR Firth & Sons’ Cast Steel. MANUFACTURERS OF Hammers, Stone Cutters’, Black amithe’ and Horse-Shoera’ Tools, 13 and15 Ton Yen eT ee Rew Market, San Francla ar Bledges, SHEET IRON PIPE. TILE Risdon Iron and Locomotive Works Corner Howard and Beale Streets, Are prepared to mako SHEET IRON AND ASPHALTUM PIPE, of any size and for any pressure, and contract to lay the same where wanted, guaranteeing o perfect working pipe with tho least amount of maierial. All kinds of OAR WHEELS, AXLES and RAILROAD WORK made to order. Standard sizes of Wheele constantly on hand. Wheels hored and pressed on, Axles turned, etc., at Reasonable Rates. we All kinds of Machinery made and repaired. 24y22-30 JOSEPH MOORE, Superintendent. J. M. STOCKMAN, Manufacturer of PATTERNS AND, MODELS, (Over W. T. Garratt’s Brass Foundry). N.W. corner Natoma and Fremont strests, 8. F. En trance on Natoma street, 6v23-3m da Diploma for thie Pump. wou hy tho Commities.} 0. W. DICKIE, H. B. ANGEL, W, EPPELSHEIMER, MELLVILLE ATWOOD. (No other Steam Pump received other than a Diploma or honorable mention at the LAST Mechanics’ Exhibition, al! other assertions to the contra notwithstanding. Hooker's Hand Pump was the only Pump, of any kind whatsoever, that received a MEDAL and FIRST PREMIUM (highest award to pumps) at the /ast Exhibition, for which wo are also selling agents.—See oficial Report of the above Committee.) CHAS. R. STEIGER, Tho trial of Steam Pumps at tho Eighth Industriai Fair in San Francisco, by a committeo of fyo of the most thoronghly practicai mechanics on ihi~ coast (as abovo namicd), showed that the Blake Pump guve 8G per cent. of ntilized power, whilo othere gave but 60 por cent., showing great difference in economy. The Blake Pump ts the ONLY Steam Pump that EVER RECEIVED A SILVER MEDAL at any Exhtbilion of dhe Mechanics’ Institute ever Acid in San Francisce or California. RIA completo etock of ali sizes constantly on hand at the Machinory Warehouse of the Agente, TREADWELEL & CO., Market street, corner of Fremont, San Francisco. KNOWLES’ PATENT STEAM PUMP. THE TRUTH! A. L. FISH, Agent Knowles’ Steam Pump—Dear Sir: In answer to your inquiries, we state that the highest award for Steam Pumps at the Eighth or last Mechanics’ Fair in San Francisco, was a First Premium and Diploma, awarded to the Knowles’ Patent Steam Pump, as published in the Official List September 23d, 1871. A. 8. HALLIDIE, President Board of Managers.

W. H. Wiuniams, Sec’y Board of Managers Eighth Industrial Exhibition, M. I. 12y3-awbp It has no Cranks or Fly-Wheel, and has no dead points where it will stop, consequently it is always ready to start without using a starting-bar, and does not require hand-work to get it pak the center. Will always start when the steam cylinder is filled with cold water of conensation. The trial of Steam Pumps at the Eighth Industrial Fair in San Francisco, by a Committee of Five of the most thoroughly practical mechanics on this coast, showed the Knowles Pump to lose but 11% per cent., while others lost as high as 40 per cent., showing great difference in economy. WE BUILD AND HAVE CONSTANTLY ON HAND THE LARCEST STOCK OF PUMPS IN THE WORLD, And for Eyery Conceivable Purpose. A. L. FISH, Agent. No 9 First Street, San Francisco, Cal. P. §.—All kinds of new and second-hand Machines on hand. 3v24-eow-bp Metallurgy and Ores. RODGERS, MEYER & CO., COMMISSION MERCHANTS, ADVANCES MADE Onall kinds of Ores, and parttcutar attenttor PAID TO CONSIGNMENTS OF GOODS, 4v16-3m LOUIS FALKENAU, STATE ASSAYER, Analytical and Consulting Chemist, 421 Montgomery St. up statra, Particular aitention given to the Analysis of Ores Minerals, Metailurgleal Produdts, Mineral Waters, Soils, Commercial Articles, Etc. One ortwo pupile can receivo theoreiical and practicalinvstruction in Assaying, Analyeie, or any particular branch of Chemistry at the laboratory. liv213w LEOPOLD KUH, (Formerly of the U, S. Brench Mint, 8. F.} Assayer and Metallurgica? CHEMIST, No. OL1 Commerctal Street, (Opposite the U.8. Branch Mint, San Franoisco, Can, Tv2l-3m J. W. THURMAN, (Successor to S. W. Howland & Co.,) ORE CRUSHERS AND SAMPLERS, Nos. 413 and 415 Mission Street, SAN FRANCISCO. Particular attention paid to Ores received on consignment ALL ORDERS EXECUTED AT THE OHORTEST NOTICE, 5y24-6m, CALIFORNIA ASSAY OFFICE No. 612 CALIFORNIA STREET, One Door West of Montgomery.........SAN FRANCISOO, J. A. MARS, Assayer. aa” Analysis of Ores, Mineral Waters, ete, 1Ov2e Richardson & Co., Copper Ore Wharves, SWANSEA. _ RicHaRnson & Co. have been for thirty years estabiished in Swansea us Agents for Ure peer erating anipling, Assay~ ing, and Sale of Oopper, Silver, Gold. Lead, Zinc, and all other Ores and Metals, for which they have extensive Warehousos and Wharves under cover, 1,000 feet of Quay Frontage within the Floating Dock, and the most complote Machinery and Appliances. They aro also prepared to make advances against Ores in anticipation of realization, and to guarantee all paymouts when required. Tiv2i-ly G. W. 6TRONG, W. L. 6TRONG G. W. STRONG & CO., Metallurgical Works, No. 10 Steveneon Strect, near First, Sawn Franoisco Wo purchase Ores, Bullion, ete. Ores worked and Teste made with care. Also, Assays of Gold, Silver, Copper, Lead, Tin and other Metale. 23722 . PLATINUM Vessels, Apparatus, Sheet, Wire, Etc. Etc. For all Lahoratory and Manufacturing Purposes M RAYNOR, 25 Bond street, ‘New York. Platinum Scrap and Ore purchased. 22v18 JOHN TAYLOR & CO., IMPORTERS OF AND DEALERS IN ASSAYERS’ MATERIALS, Chemical Apparatus and Chemicals, Druggists’ Glassware and Sundries, PHOTOGRAPHIC GOODS, ETC., 612 ‘and 614 Washington street, SAN FRANCISCO. We would call the epecial attention of Assayers, Chemiste, Mining Companies, Milling Cotmpanles, BLAKE’S PATENT STEAM PUMP. From the Report of the Committee on Steam Pumps, at tho Seventh Industrial Exhibition of the Mechanics’ Institute, Son Francieca BLAKE'S STEAM PUMP.—Thie Pump yielded the hest resulte as to the quantity of water discharged as comparcd with its measured capacity. ‘tho valves are of hrase, und well arranged, The steam yalvee ore well arranged for operating tho pumps, either fust or slow. We recommend that a Medal he awarded to it, as THE BEST STEAM PUMP. ILVEn MEDAL, the first premium.j (Signed) 8 SPIERS, WM. H. BIRCH, the Report of the Committee on Steam Pumps, at the Eighth (or Jast) Industrial Exhihition of the San Francisco : BLAKE'S MINING PUMP.—This is an excellcnt Pump, well made, and gives a high per cent. of duty. We recommend a Diploma for this Pump. (Signed by the Committee.) G. W. DICKIE, H. B. ANGEL, OHAS. R, STEIGER, ‘W. EPPELSHEIMER, MELVILLE ATWOOD. {No other Steam Pump received other than a Diploma or honorahle mention at the LAST Mechanics’ Exhihition, all other assertions to the contrary notwithstanding. Hooker's Hand Pump was the only Pump of any kind whatsoever, that received a MEDAL and FIRST PREMIUM (highest oward to pumpe) at the last Exhihition, for which we are also solling agente.—See official Report of the abeve Commitice.] The trial of Steam Pumpe at the Eighth Industrial Fair in San Francisco, hy a committco of five of the most thoroughly practical mechanice on thie coust (as ahoye named), showed that the Blake Pump gave 86 per cent. oj utilized power, while others gavo hut 60 per cent., showing great difference in economy. The Blake Pump is the ONLY Steam Pump that EVER RECEIVED A SILVER MEDAL at any Exhibition of the Mechanics’ Institute ever held in San Francisco or California R@ A completo stock of all sizes constantly on hand at the Machinery Warehouse of the Agents, TREADWELL & CO., Market Street, corner of Fremont, San Francisco. (Awarded a JAS. From h Me 7 ip ‘e, etc., to our large and well adapted stock of ASSAYERS’ MATERIALS —AND— Chemical Apparatus, Having heen engaged in furnishing these supplies since the first discovery of mines on tho Pacific Coast, WE ENUMERATE 1N PART: Assay Balances—L. Oertlings, London. Assay Balances—Becker & Sone, Antwerp. Chemical Balancee—Becker & Sons, Antwerp. Ore or Pulp Balances—Becker & Sons, Antwerp, Assay Weights—Graine and Grammes. Bullion Balancee and Weights. Humid Assay Apparatus. Iron Furnaces—lmproved, Lined with Fire Brick for Cupeliing and Melting. Tonge, Muifles, Cupcl Moulds, Assay Moulds, Scorifiers, Roasting Dishes, Annealing Cups, French Clay, Assay Crucihles, Hessian for Sand) Crucihles. Dixon's Celebrated Black Lead Crucihles aud Covere— all sizee. Assayers’ and Chemical Glasswaro and Assayers’ Hardware—a full assortment. Steel Stamps for haie cut to order. ACIDS AND CHEMICALS. Acid in carhoys and hottles, commercially and chemi cally pure. Bi Carh. Soda, Borax, Bone Ashes, Litharee. Assay Lead in hars, rolled and granulated. Black Oxide Manganese, Sodium and Sodium Amalgam, Sulphate of Copper, Quicksilver, and all Chemicaly and Reagents required hy Assayere and Milling Co.'s, fa” Our Gold and Silver Tahles, showing the value per ounce Troy at different degrees of fineness, and valnahle tahles for computation of assays in Graius and Grammes, will he sent upon application, 24v23-tf JOHN TAYLOR & CO,