The Assayer's Manual: An Abridged Treatise on the Docimastic Examination of Ores, and Furnace and Other Artificial Products |
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Page 31
... mixtures , for instance , assay of lead with carbonate of potassa , flour and iron ) . 2. The sample is added to the fluxes already in the crucible , in cases where the puffing up of the charge on heating is not feared , and is ...
... mixtures , for instance , assay of lead with carbonate of potassa , flour and iron ) . 2. The sample is added to the fluxes already in the crucible , in cases where the puffing up of the charge on heating is not feared , and is ...
Page 32
... mixture is poured into the crucible through the spout of the scoop , about 20 millimeters ( 0.78 inch wide ) , a brush being used to brush out the last traces of the mixture ; or , in case a very vigorous chemical reaction is desired ...
... mixture is poured into the crucible through the spout of the scoop , about 20 millimeters ( 0.78 inch wide ) , a brush being used to brush out the last traces of the mixture ; or , in case a very vigorous chemical reaction is desired ...
Page 33
... mixture of 13 parts of potassium carbonate and 10 parts of anhydrous sodium carbonate in a platinum crucible ) . 2. Roasting . - Metallic sulphides , arsenides , and anti- monides are heated in presence of air to a temperature ...
... mixture of 13 parts of potassium carbonate and 10 parts of anhydrous sodium carbonate in a platinum crucible ) . 2. Roasting . - Metallic sulphides , arsenides , and anti- monides are heated in presence of air to a temperature ...
Page 64
... mixture of unburnt fire - clay and dust of fire - bricks , glass pots , or seggars . - TRANSLATOR . ] possible . ) The vessels should further be very compact 64 ASSAYING . ASSAY VESSELS General Remarks; Assay Vessels for the Dry Method ...
... mixture of unburnt fire - clay and dust of fire - bricks , glass pots , or seggars . - TRANSLATOR . ] possible . ) The vessels should further be very compact 64 ASSAYING . ASSAY VESSELS General Remarks; Assay Vessels for the Dry Method ...
Page 66
... mixture of 90 to 95 per cent . retort graphite , 5 per cent . rosin , and some petroleum , and burned with exclusion of air . They are covered with the perforated lid c . They are 37 milli- meters ( 1.45 inches ) high and 25 millimeters ...
... mixture of 90 to 95 per cent . retort graphite , 5 per cent . rosin , and some petroleum , and burned with exclusion of air . They are covered with the perforated lid c . They are 37 milli- meters ( 1.45 inches ) high and 25 millimeters ...
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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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