Volume 18 (1869) (430 pages)

On O24 O44 OK Subserlption, S6 Per Anuum, Single Coples, 15 Cents. A Journal of Useful Arts, Science, and Mining and Mechanical Progress. BY DEWEY & CO., Patent Solleltors, SAN Francisco, SATURDAY, Aprit 24, 1869. VOLUME XVIII. Number i. Table of Contents. Jeaning’s Mpioyed Mining} MecaamicaL . Misckitany.— Stures—th, Runaway Eugiues; A Len nets tis« Engine—Ill, other Steant Mu Vater Cilorlynatan of oliver Ores for Steel Warde Holler Mineralogleal xud Geological! Buwtjaints and Kivets, ete. Scikatirio Miscre.any— The Colors of Autumnal Follage: Creation by Caw or bs Miracle: the sun's Upustiturion, ete. Exainrerina MM scruvany.— Subniarine Englueering ; Heli-Gate Blasting; Leyelfug the Interlor Towns. ising Susteaky—Coinprising late futelligence from the variius counties and distrlets tn Culitornin, ColoraNotes Shaking Winds by Kall. Cadtorma Acudemy of Scl cuces, Quwkots myrocess with Sulpuurel Resouces aud Developments White Pine Leeins. Riltroad Ltemns, Mining tems, S48 franeweo Market Rates. Notices to Correspondents, Stock Priecs—Blil and Asked. New Licorporations, do, dah eb Ay NeAGHICELTURAL MisteLuaxy.— vada and Oregon. The Piilosophy of Day-San Fraucisco Mining Share Making; What ls to be holders! Directory, une with Our Wheat, etc. san Francisco Metal Market, Jennings’ Improved Mining Sluice. Whatever presents a reasonable prospect of improvementin mining operations, is worthy of attentive consideration. It is eoceldom that we are enabled to give anything new in the direction of eluice building, that we are especially pleased to be able, to-day, to give a brief description of a newly-invented sluice for use either in quartz or placer mining, the invention of Mr, Orlando Jennings, of North San Juan, Nevada County, 2 well-known and thorough-going practical miner. Mr. J. first applied the device to the separation of gold and eulphurets from the eands issuing from a qnartz mill hattery; its succees there uttracted the attention of a neighboring placer miner who eolicited and ohtained the Privilege of trying the principle at his hydraulie diggiegs, where it is now giving the highest satisfaction. A proper working of this sluice, whether attached to a quartz mill or operated in placer diggings, requires a previous eizing of the material to be put through, and Mr. Jennings is now engaged in perfecting a convenient apparatue for this work—that for quartz mill purposes will be constructed on the principle of Rittinger’e Pointed Boxes, while for placer digginge a modified “ grizzly” or series of grate bars will be employed. The annexed engraving represents a short section of the bottom of the eluice. CC represents the bottom or floor. A eeries ‘of grooves and rifiles will be observed at EE, running from either side to a central channel, slightly depressed in the bottom of the slnice. Snceh isthe simple conetruction of thedevice. The principle of ite working is as follows: When the ore or sand, with the water, is received into the upper end of the sluice, at A, the action of the grooves and rifles is to deflect the water, mixed . . ! with the earthy particles, from the Seer to, the center, until the eame becomes piled ' up, ina longitudinal ridge, along the center of the eluice. From the top of this ridge, again, there is a tendency of tho water to flow offtowardsthesides. This gives two enrrents—one towards tho center on the bottom, and the other away from the ceuter and towards the sides, on the top. The result is thatthe particles of the greatest epccitic gravity tend to the bottom central groove, while the lighter and coarser sand rises towards the snrface, is rolled outwards and passes down the slnice in two eeparate eurrents, parallel to the central groove, and between it and’ the sides of the sluice, as shown by the waving enrrent lines. By the establishment of theee concentrating and separating currents, the heavier . particles are more readily and effectnally . eeparated from the lighter, than when the latter is allowed to rest directly upon the former; while at the same time the escape Lenoir’s Gas Engine. To furish an idea of the principle and method of operation of this most eonvenient inveution, the accompanying diagrain will snfliciently eerve. It is necessary only to premise that one of Lenoir's machines of one half horse-power French, or nearly one horse-power English, may be seen daily at work in the office of the Courrier de San Francisco, on Jackeon street a few doors above Montgomery. The diagram represents a single cylindér, and all that there is of the machine except the erank-wheel which transmits the power from the piston rod H, after changing it into rotary motion, to the printing press, or any other machiue, in the parlor, cellar, or garret, requiring power. Common lighting gas is the agent, of the waste sands is more readily brought . in place of steam ; it is mixed with atmosabout and with less admixture with the met. pheric air, in avery simple manner, antoSe Le LENOIR’S GAS ENGINE. alliferous particles, than when both are allowed to pass down the slnice by the eame current—the one euperimposed upon the other. Application fora patent for this invent.on has been made through the Mzyine AND Screntrric Press Patent AcEncy. See advertisement in its appropriate eolumu. ss Tut Fires nor yer Extincuissep.—The latest telegraphic reports from Gold Hill report that the fire in the mines is not yet extingnished, and that the smoke is eo dense in the ehafts and drifts that hut little effective work can be done towards their direct extinguishment. Since the accident on Monday last, by which one of the men engaged in the work of extinguishment lost his life, nothing epecial has occurred. Workmen aro still engaged in forcing water upon the fire, wherever it can be reached; but apparently with very little effect. The injury to the mines will probably be far more serious than has heretofore been apprehended. Aside from the direct loss to stockholders, and the terrihle bereavement, by loss of life, much distrese is produced by the great number of people who have been thus temporarily thrown out of employment by the etoppage of work at the mines and mills, The monetary public ' will also feel, to a greater or less extent, the snppression of the usual yield from these ,miues of some $850,000 worth of bullion per month. matically, in the proportion ofnine of air to one of gas, which makes an explosive carbureted hydrogen compound similar to the explosive gas in coal mines, or marsh gas, —the samething. Commoncoal gas, or the olefiant gas of the laboratory, is CH, the explosive mine gas CH2. Mixtnre of air with the former 9:1, imparts the extra equivalent of hydrogen to make it explosive. The gas-pipe connects with the machine at B, where, by means of an inverted cup itis measured off, at every stroke of the rod, with the proper quantity of air, and distributed evenly through the holes C, for entrance into the cylinder, alternately through the openings D and E regwlated by the slide valve rod A, which shuts the one while it opens the other, On the opposite side there are similar openings I and J, and a similar slide valve arrangement L, to let out the exploded or burut gases, (C Ozand HO) carbonie acid and vapor, through I. The moment that the space (P) in the cylinder is filled with gas, tbe automatic connections are such that an electric spark touches it off by the wire G, driving the piston H from a little distance on the P side of the middle, towards the other end of the eylinder, by. a pressure of 5 to 6 atmoeheres, But at the instant that the piston Feachee a oertain point a little beyoud the. middle, on the other side, an explosion takes place on the opposite side of the piston by a spark from F, which drives it back again, This repeats itself perpetually; the only preliminary, in the place of “steaming up” or engineering necessary being the turning on of gas, and making of the wiro connection, The device by which electricity is made to tonch off opposite volumes of gas alternately, is chown at M, —a piece of iron connecting with a pole of the battery, which swings by automatic connection, once to N, and then to O. A one horse-power engine consunies about 49 enbie feet of gas per hour; which, at $6 per 1,000 feet, wonld amount to 24 cents an hour. The Courrier engine, a half horse-power, saye Mr. Derbee, costs him not over 15 cents an hour, The cost for nitrie acid in the battery is scarcely worth mentioning. The only trouble that has been experienced in the nse of tho engine thns far, has arisen from the impurity of our city gas, necessitating cleaning of the passages D and E about once a month. Theso engines cost in Paris: %4 horsepower, 800 fr.; 1 horse-power, 1,300 fr. ; 2 horee-power, 2,000 fr. ; 3 horse-power, 2,500 fr. Goto anp SmveR CHLORINATION IN Merxico.—A valuable article by Ottocar Hoffman, ou the second page, seuves as an example of the definite kind of writing whichis necessary on metallurgical enbjects to enable others to profit by the description of @ process—our real road to progress in that very important epecialty—and at the same time calls for a word or two from us, of discrimination. Chlorides of the base metals and of gold aro soluble in water, whilo chloride of eilver is not, heingsoluble only insalt water, or in water containing hyposulphate of eoda in solution, In the Plattner gold chlorination, silver, accordingly, is lost. If the baee metal sulphurets are roasted to oxides, they cannot afterwards be chlorinated with chlorine gas; therefore if eopper is to be gained, as, for example, at La Dura, salt must be added during the roasting; which chlorinates the several metale at different temperatures, but eilver last, the base metal chlorides being ordinarily re-decomposed by the time that the eilver becomes a chloride. In order to get both silver and gold into a etate of chloride without decomposing CuCl, etc.,Plattner’e gas generation process is taken advantage of; and gold, copper, ete.—all but silver chloride—are leaclied out with water, aud precipitated separately. Then the hyposulphite of soda, or the salt water leaching process, may follow, to obtain the eilver, Kustel’s silver chlorination differs from the Patera process simply i in the, method of chloriuating silver; avoiding, ‘by the use of ohlorine gas, the necessity for a very costly and complicated donble roasting, with salt, steam, and ae of iron. , Anu THE Gomp in a world might be put . into a ube of 26 feet.

On O24 O44 OK Subserlption, S6 Per Anuum, Single Coples, 15 Cents. A Journal of Useful Arts, Science, and Mining and Mechanical Progress. BY DEWEY & CO., Patent Solleltors, SAN Francisco, SATURDAY, Aprit 24, 1869. VOLUME XVIII. Number i. Table of Contents. Jeaning’s Mpioyed Mining} MecaamicaL . Misckitany.— Stures—th, Runaway Eugiues; A Len nets tis« Engine—Ill, other Steant Mu Vater Cilorlynatan of oliver Ores for Steel Warde Holler Mineralogleal xud Geological! Buwtjaints and Kivets, ete. Scikatirio Miscre.any— The Colors of Autumnal Follage: Creation by Caw or bs Miracle: the sun's Upustiturion, ete. Exainrerina MM scruvany.— Subniarine Englueering ; Heli-Gate Blasting; Leyelfug the Interlor Towns. ising Susteaky—Coinprising late futelligence from the variius counties and distrlets tn Culitornin, ColoraNotes Shaking Winds by Kall. Cadtorma Acudemy of Scl cuces, Quwkots myrocess with Sulpuurel Resouces aud Developments White Pine Leeins. Riltroad Ltemns, Mining tems, S48 franeweo Market Rates. Notices to Correspondents, Stock Priecs—Blil and Asked. New Licorporations, do, dah eb Ay NeAGHICELTURAL MisteLuaxy.— vada and Oregon. The Piilosophy of Day-San Fraucisco Mining Share Making; What ls to be holders! Directory, une with Our Wheat, etc. san Francisco Metal Market, Jennings’ Improved Mining Sluice. Whatever presents a reasonable prospect of improvementin mining operations, is worthy of attentive consideration. It is eoceldom that we are enabled to give anything new in the direction of eluice building, that we are especially pleased to be able, to-day, to give a brief description of a newly-invented sluice for use either in quartz or placer mining, the invention of Mr, Orlando Jennings, of North San Juan, Nevada County, 2 well-known and thorough-going practical miner. Mr. J. first applied the device to the separation of gold and eulphurets from the eands issuing from a qnartz mill hattery; its succees there uttracted the attention of a neighboring placer miner who eolicited and ohtained the Privilege of trying the principle at his hydraulie diggiegs, where it is now giving the highest satisfaction. A proper working of this sluice, whether attached to a quartz mill or operated in placer diggings, requires a previous eizing of the material to be put through, and Mr. Jennings is now engaged in perfecting a convenient apparatue for this work—that for quartz mill purposes will be constructed on the principle of Rittinger’e Pointed Boxes, while for placer digginge a modified “ grizzly” or series of grate bars will be employed. The annexed engraving represents a short section of the bottom of the eluice. CC represents the bottom or floor. A eeries ‘of grooves and rifiles will be observed at EE, running from either side to a central channel, slightly depressed in the bottom of the slnice. Snceh isthe simple conetruction of thedevice. The principle of ite working is as follows: When the ore or sand, with the water, is received into the upper end of the sluice, at A, the action of the grooves and rifles is to deflect the water, mixed . . ! with the earthy particles, from the Seer to, the center, until the eame becomes piled ' up, ina longitudinal ridge, along the center of the eluice. From the top of this ridge, again, there is a tendency of tho water to flow offtowardsthesides. This gives two enrrents—one towards tho center on the bottom, and the other away from the ceuter and towards the sides, on the top. The result is thatthe particles of the greatest epccitic gravity tend to the bottom central groove, while the lighter and coarser sand rises towards the snrface, is rolled outwards and passes down the slnice in two eeparate eurrents, parallel to the central groove, and between it and’ the sides of the sluice, as shown by the waving enrrent lines. By the establishment of theee concentrating and separating currents, the heavier . particles are more readily and effectnally . eeparated from the lighter, than when the latter is allowed to rest directly upon the former; while at the same time the escape Lenoir’s Gas Engine. To furish an idea of the principle and method of operation of this most eonvenient inveution, the accompanying diagrain will snfliciently eerve. It is necessary only to premise that one of Lenoir's machines of one half horse-power French, or nearly one horse-power English, may be seen daily at work in the office of the Courrier de San Francisco, on Jackeon street a few doors above Montgomery. The diagram represents a single cylindér, and all that there is of the machine except the erank-wheel which transmits the power from the piston rod H, after changing it into rotary motion, to the printing press, or any other machiue, in the parlor, cellar, or garret, requiring power. Common lighting gas is the agent, of the waste sands is more readily brought . in place of steam ; it is mixed with atmosabout and with less admixture with the met. pheric air, in avery simple manner, antoSe Le LENOIR’S GAS ENGINE. alliferous particles, than when both are allowed to pass down the slnice by the eame

current—the one euperimposed upon the other. Application fora patent for this invent.on has been made through the Mzyine AND Screntrric Press Patent AcEncy. See advertisement in its appropriate eolumu. ss Tut Fires nor yer Extincuissep.—The latest telegraphic reports from Gold Hill report that the fire in the mines is not yet extingnished, and that the smoke is eo dense in the ehafts and drifts that hut little effective work can be done towards their direct extinguishment. Since the accident on Monday last, by which one of the men engaged in the work of extinguishment lost his life, nothing epecial has occurred. Workmen aro still engaged in forcing water upon the fire, wherever it can be reached; but apparently with very little effect. The injury to the mines will probably be far more serious than has heretofore been apprehended. Aside from the direct loss to stockholders, and the terrihle bereavement, by loss of life, much distrese is produced by the great number of people who have been thus temporarily thrown out of employment by the etoppage of work at the mines and mills, The monetary public ' will also feel, to a greater or less extent, the snppression of the usual yield from these ,miues of some $850,000 worth of bullion per month. matically, in the proportion ofnine of air to one of gas, which makes an explosive carbureted hydrogen compound similar to the explosive gas in coal mines, or marsh gas, —the samething. Commoncoal gas, or the olefiant gas of the laboratory, is CH, the explosive mine gas CH2. Mixtnre of air with the former 9:1, imparts the extra equivalent of hydrogen to make it explosive. The gas-pipe connects with the machine at B, where, by means of an inverted cup itis measured off, at every stroke of the rod, with the proper quantity of air, and distributed evenly through the holes C, for entrance into the cylinder, alternately through the openings D and E regwlated by the slide valve rod A, which shuts the one while it opens the other, On the opposite side there are similar openings I and J, and a similar slide valve arrangement L, to let out the exploded or burut gases, (C Ozand HO) carbonie acid and vapor, through I. The moment that the space (P) in the cylinder is filled with gas, tbe automatic connections are such that an electric spark touches it off by the wire G, driving the piston H from a little distance on the P side of the middle, towards the other end of the eylinder, by. a pressure of 5 to 6 atmoeheres, But at the instant that the piston Feachee a oertain point a little beyoud the. middle, on the other side, an explosion takes place on the opposite side of the piston by a spark from F, which drives it back again, This repeats itself perpetually; the only preliminary, in the place of “steaming up” or engineering necessary being the turning on of gas, and making of the wiro connection, The device by which electricity is made to tonch off opposite volumes of gas alternately, is chown at M, —a piece of iron connecting with a pole of the battery, which swings by automatic connection, once to N, and then to O. A one horse-power engine consunies about 49 enbie feet of gas per hour; which, at $6 per 1,000 feet, wonld amount to 24 cents an hour. The Courrier engine, a half horse-power, saye Mr. Derbee, costs him not over 15 cents an hour, The cost for nitrie acid in the battery is scarcely worth mentioning. The only trouble that has been experienced in the nse of tho engine thns far, has arisen from the impurity of our city gas, necessitating cleaning of the passages D and E about once a month. Theso engines cost in Paris: %4 horsepower, 800 fr.; 1 horse-power, 1,300 fr. ; 2 horee-power, 2,000 fr. ; 3 horse-power, 2,500 fr. Goto anp SmveR CHLORINATION IN Merxico.—A valuable article by Ottocar Hoffman, ou the second page, seuves as an example of the definite kind of writing whichis necessary on metallurgical enbjects to enable others to profit by the description of @ process—our real road to progress in that very important epecialty—and at the same time calls for a word or two from us, of discrimination. Chlorides of the base metals and of gold aro soluble in water, whilo chloride of eilver is not, heingsoluble only insalt water, or in water containing hyposulphate of eoda in solution, In the Plattner gold chlorination, silver, accordingly, is lost. If the baee metal sulphurets are roasted to oxides, they cannot afterwards be chlorinated with chlorine gas; therefore if eopper is to be gained, as, for example, at La Dura, salt must be added during the roasting; which chlorinates the several metale at different temperatures, but eilver last, the base metal chlorides being ordinarily re-decomposed by the time that the eilver becomes a chloride. In order to get both silver and gold into a etate of chloride without decomposing CuCl, etc.,Plattner’e gas generation process is taken advantage of; and gold, copper, ete.—all but silver chloride—are leaclied out with water, aud precipitated separately. Then the hyposulphite of soda, or the salt water leaching process, may follow, to obtain the eilver, Kustel’s silver chlorination differs from the Patera process simply i in the, method of chloriuating silver; avoiding, ‘by the use of ohlorine gas, the necessity for a very costly and complicated donble roasting, with salt, steam, and ae of iron. , Anu THE Gomp in a world might be put . into a ube of 26 feet.