The Mining Magazine and Journal of Geology, Mineralogy, Metallurgy, Chemistry and the Arts, Their Applications to Mining and Working Useful Ores and Metals, Volume 11860 |
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Page 17
... chlorides ; this process is completed in five hours . Eight hundred pounds of this powder are put into the amalgamation barrel , together with a certain quantity of water and 75 pounds of the copper balls from the smelting furnaces ...
... chlorides ; this process is completed in five hours . Eight hundred pounds of this powder are put into the amalgamation barrel , together with a certain quantity of water and 75 pounds of the copper balls from the smelting furnaces ...
Page 18
... chloride of silver will be precipitated into metallic silver by the presence of the metallic copper ; chloride of copper will be formed , and this will be lost . The silver in the metallic state in contact with the quicksilver then ...
... chloride of silver will be precipitated into metallic silver by the presence of the metallic copper ; chloride of copper will be formed , and this will be lost . The silver in the metallic state in contact with the quicksilver then ...
Page 19
... chloride of copper which remains after amalga- mation , from three to four per cent . of the weight of the ore is required . Eleven barrels , yielding 119 pounds of silver , showed a loss of 59 pounds of quicksilver . This is four ...
... chloride of copper which remains after amalga- mation , from three to four per cent . of the weight of the ore is required . Eleven barrels , yielding 119 pounds of silver , showed a loss of 59 pounds of quicksilver . This is four ...
Page 32
... chlorides of iron , copper and silver , with the mechan- ical elevation of the vapors of many other minerals , and per- haps of the solution or vapor of chloride of gold , and we shall be in a position to account for the filling not ...
... chlorides of iron , copper and silver , with the mechan- ical elevation of the vapors of many other minerals , and per- haps of the solution or vapor of chloride of gold , and we shall be in a position to account for the filling not ...
Page 75
... chlorides " in contact with iron , as he had explained at a previous meeting in regard to gold . It is well known that ... chloride , is plated upon it ; the two metals chemically pure are in contact yet unalloyed . The old theory of the ...
... chlorides " in contact with iron , as he had explained at a previous meeting in regard to gold . It is well known that ... chloride , is plated upon it ; the two metals chemically pure are in contact yet unalloyed . The old theory of the ...
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acid amount antimony appears Arizona arsenic assay average basin beds Bornite bottom calcination California carbonate Carboniferous cent chemical chloride coal collieries contain copper cost Cretaceous crevice crystals cupel Dahlonega decomposed decomposition deposits depth discovery district east Edward Hitchcock employed explorations extended extraction formation formed fossils furnace galena geological geologists gold gossan heat Hill hundred feet inches iron labor Lake Superior lead limestone locality lode lower mass matts melted metal metamorphic miles mineral Mining Company mountains nearly observed obtained occur opening operation orthoclase ounces oxyd portion precipitation present produced proportion pyrites quantity quartz region Report reverberatory furnace rich river roasting rock salt sandstone schists shaft shales silver slag smelting Sonora specimens steel strata sulphate sulphur sulphuret surface Survey temperature Tetradymite thickness tion tons tubs upper Valley vein vicinity Virginiatown washed yield zeolites zinc
Popular passages
Page 154 - On this difficult and mysterious subject a work will very shortly appear, by Mr. Charles Darwin, the result of twenty years of observation and experiments in Zoology, Botany, and Geology, by which he has been led to the conclusion, that those powers of nature which give rise to races and permanent varieties in animals and plants, are the same as those which, in much longer periods, produce species, and, in a still longer series...
Page 154 - Geology, by which he has been led to the conclusion, that those powers of nature which give rise to races and permanent varieties in animals and plants, are the same as those which, in much longer periods, produce species, and, in a still longer series of ages, give rise to differences of generic rank. He appears to me to have succeeded, by his investigations and reasonings...
Page 152 - I have thus failed to obtain satisfactory evidence in favor of the remote origin assigned to the human fossils of Le Puy, I am fully prepared to corroborate the conclusions which have been recently laid before the Royal Society by Mr. Prestwich, in regard to the age of the flint implements associated in undisturbed gravel, in the North of France, with the bones of elephants at Abbeville and Amiens. These were first noticed at Abbeville, and their true geological position assigned to them by M. Boucher...
Page 373 - ... of iron and manganese, were brought in contact with the fluid metal, during the process, and the quantity of phosphorus was thereby reduced. Thus many months were consumed in laborious and expensive experiments ; consecutive steps in advance were made, and many valuable facts were elicited.
Page 153 - Somme, in an area fifteen miles in length. I infer that a tribe of savages, to whom the use of iron was unknown, made a long sojourn in this region ; and I am reminded of a large Indian mound, which I saw in St.
Page 97 - Gash veins may cross the strata at any angle ; but are limited to one particular group of strata, and are peculiar to the unaltered sedimentary rocks. True veins are aggregations of mineral matter, accompanied by metalliferous ores, within a crevice or fissure which had its origin in some deepseated cause, and which may be presumed to extend for an indefinite distance downwards.
Page 85 - Post 8vo. 8s. 6d. (FC) Principles of Athenian Architecture, and the Optical Refinements exhibited in the Construction of the Ancient Buildings at Athens, from a Survey. With 40 Plates. Folio. 61. 5s. PERCY'S (JOHN, MD) Metallurgy; or, the Art of Extracting Metals from their Ores and adapting them to various purposes of Manufacture.
Page 151 - Faleoner, of the Brixham Cave, must, I think, have prepared you to admit that scepticism in regard to the cave-evidence in favour of the antiquity of man had previously been pushed to an extreme.
Page 153 - ... feet above the present level of the Somme, for the deposition of fine sediment, including entire shells, both terrestrial and aquatic, and also for the denudation which the entire mass of stratified drift has undergone : portions having been swept away, so that what remains of it often terminates...
Page 153 - ... besides being covered by a newer unstratified drift. To explain these changes, I should infer considerable oscillations in the level of the land in that part of France ; slow movements of upheaval and subsidence, deranging, but not wholly displacing, the course of the ancient river.