The Assayer's Manual. An Abridged Treatise on the Docimastic Examination of Ores, and Furnace and Other Artificial Products |
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Page 35
... completely as possible ( for instance , copper ores , but lead ores in a less degree ) , can only be removed by repeating the rubbing up of the assay sample twice or three times , mixing it with charcoal powder , and glowing until the ...
... completely as possible ( for instance , copper ores , but lead ores in a less degree ) , can only be removed by repeating the rubbing up of the assay sample twice or three times , mixing it with charcoal powder , and glowing until the ...
Page 50
... completely utilized , and besides , they are more difficult to attend than the wind and blast furnaces , where the crucibles , etc. , are placed directly in the glowing fire , or come in direct con- tact with the flame . The furnaces ...
... completely utilized , and besides , they are more difficult to attend than the wind and blast furnaces , where the crucibles , etc. , are placed directly in the glowing fire , or come in direct con- tact with the flame . The furnaces ...
Page 78
... completely dissolve in acetic acid , and be as free from gold and silver as possible . When it contains silver , white lead not adulterated with heavy spar , 2 ( PbCO3 ) + Pb ( HO ) 2 , with 86.27 PbO , may be substituted for it . It is ...
... completely dissolve in acetic acid , and be as free from gold and silver as possible . When it contains silver , white lead not adulterated with heavy spar , 2 ( PbCO3 ) + Pb ( HO ) 2 , with 86.27 PbO , may be substituted for it . It is ...
Page 79
... completely dehydrated , or in the condition known as borax - glass . This is produced by fusing borax in a clay crucible , and then pouring it upon a bright metallic surface . It is more fusible than glass , and the boracic acid forms ...
... completely dehydrated , or in the condition known as borax - glass . This is produced by fusing borax in a clay crucible , and then pouring it upon a bright metallic surface . It is more fusible than glass , and the boracic acid forms ...
Page 82
... completely lead and bismuth sulphates . Common salt ( sodium chloride ) NaCl , with 39.66 Na and 60.34 Cl , for the volatilization of antimony and arsenic in refining black copper according to the Cornish method . ― 8. Air - excluding ...
... completely lead and bismuth sulphates . Common salt ( sodium chloride ) NaCl , with 39.66 Na and 60.34 Cl , for the volatilization of antimony and arsenic in refining black copper according to the Cornish method . ― 8. Air - excluding ...
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Common terms and phrases
15 grammes 20 grammes added alloy ammonia ammonium antimony aqua regia argol arsenic assay sample beaker-glass bismuth black flux boiled borax cent charcoal charge chloride coal cobalt color common salt containing copper covering of common crucible crucible Fig cubic centimeter 0.061 cubic centimeters cubic inches cupelled decomposed determined diluted Dingler dish dried evaporated to dryness ferric oxide ferrous filtered filtrate flask fluid foreign metals Fresenius furnace fused fusion galena glass gold gramme 15.43 grains gramme 7.71 grains grammes 154.32 grains grammes 77.16 grains granulated lead heated hydrate hydrochloric acid ignited iron lead button liquid litharge mercury metallic sulphides method millimeters mixed mixture muffle muffle-furnace nickel nitric acid percentage placed platinum potassium carbonate potassium cyanide poured powdered precipitated pyrites quantity of lead residue roasted scorifier slag smelting sodium carbonate sodium sulphide solution substances sulphuretted hydrogen sulphuric acid temperature thousandths titrated tube u. h. Ztg vessels washed weighed zinc Ztschr
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