The Assayer's Manual: An Abridged Treatise on the Docimastic Examination of Ores, and Furnace and Other Artificial Products |
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Page 28
... allowed to settle , and the turbid liquid poured off ; or it is washed in Schulze's washing apparatus ( Fig . 3 ) by allowing water to flow from Fig . 3 . B 3 A a Mariotte's bottle , A , through d , upon the mass con- tained in the ...
... allowed to settle , and the turbid liquid poured off ; or it is washed in Schulze's washing apparatus ( Fig . 3 ) by allowing water to flow from Fig . 3 . B 3 A a Mariotte's bottle , A , through d , upon the mass con- tained in the ...
Page 35
... volatilized in the form of ammo- nium sulphate . ( Lead and bismuth sulphates are only incompletely decomposed by ammonium carbonate . ) The roasting dish is now taken from the muffle and allowed WORKING BY THE DRY METHOD . 35.
... volatilized in the form of ammo- nium sulphate . ( Lead and bismuth sulphates are only incompletely decomposed by ammonium carbonate . ) The roasting dish is now taken from the muffle and allowed WORKING BY THE DRY METHOD . 35.
Page 36
... allowed to cool off . The sample is then placed in a mortar and rubbed up . Modifications . When the ores are refractory ( for in- stance , copper pyrites ) , powdered charcoal or graphite is added to the sample before roasting , in ...
... allowed to cool off . The sample is then placed in a mortar and rubbed up . Modifications . When the ores are refractory ( for in- stance , copper pyrites ) , powdered charcoal or graphite is added to the sample before roasting , in ...
Page 40
... allowed to stand for a few minutes , and then boiled with the addition of a small quantity of water . It is then filtered , etc. Kipp's apparatus ( Fig 11 ) is well adapted for precipitation with sulphuretted hydrogen . C , a glass bulb ...
... allowed to stand for a few minutes , and then boiled with the addition of a small quantity of water . It is then filtered , etc. Kipp's apparatus ( Fig 11 ) is well adapted for precipitation with sulphuretted hydrogen . C , a glass bulb ...
Page 43
... allowed to become cold by placing it in the desiccator ( Fig . 17a ) , in which are fragments of caustic alkali , calcium chloride , or sul- phuric acid ( caustic soda attracts water with the greatest avidity , next follow S ! caustic ...
... allowed to become cold by placing it in the desiccator ( Fig . 17a ) , in which are fragments of caustic alkali , calcium chloride , or sul- phuric acid ( caustic soda attracts water with the greatest avidity , next follow S ! caustic ...
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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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