The Assayer's Manual: An Abridged Treatise on the Docimastic Examination of Ores, and Furnace and Other Artificial Products |
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Page 20
... remains , in such comminuted form that it will pass through a sieve having 30 by 30 meshes to the square centimeter ( about 75 meshes to the inch ) . B. Samples taken while the ore , etc. , is being weighed . -Pieces are taken at random ...
... remains , in such comminuted form that it will pass through a sieve having 30 by 30 meshes to the square centimeter ( about 75 meshes to the inch ) . B. Samples taken while the ore , etc. , is being weighed . -Pieces are taken at random ...
Page 39
... remains . The following method is used for metallic sulphides , which , when they are dissolved with acids , separate sulphur which incloses some of the ore . The solution is evaporated to dryness in a porcelain evaporating dish . The ...
... remains . The following method is used for metallic sulphides , which , when they are dissolved with acids , separate sulphur which incloses some of the ore . The solution is evaporated to dryness in a porcelain evaporating dish . The ...
Page 92
... remains , with the mouth of the muffle closed , until it has come into perfect fusion ( that is , when no more deposits are per- ceptible on the edges of the crucible ) . To decompose the sulpho - salt by oxidation , the mouth of the ...
... remains , with the mouth of the muffle closed , until it has come into perfect fusion ( that is , when no more deposits are per- ceptible on the edges of the crucible ) . To decompose the sulpho - salt by oxidation , the mouth of the ...
Page 95
... remains as lead antimo- niate with the lead sulphate , the process is as follows : The assay sample is decomposed by nitric acid , to which some tartaric acid has been added . It is neutralized with sodium carbonate , and the antimony ...
... remains as lead antimo- niate with the lead sulphate , the process is as follows : The assay sample is decomposed by nitric acid , to which some tartaric acid has been added . It is neutralized with sodium carbonate , and the antimony ...
Page 105
... remains bright , ceasing to fume ( should the process be continued the button would become dull from a covering of cuprous oxide ) ; and also , by the subsiding of the slag , that is , if the button is not too large , and does not weigh ...
... remains bright , ceasing to fume ( should the process be continued the button would become dull from a covering of cuprous oxide ) ; and also , by the subsiding of the slag , that is , if the button is not too large , and does not weigh ...
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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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