The Assayer's Manual. An Abridged Treatise on the Docimastic Examination of Ores, and Furnace and Other Artificial Products |
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Page v
... weighed ; Samples by Rasping ; Slag Sampies ; Heterogeneous Fragments ; Sam- pling by the Crossing Method • Sampling by Dropping the Ore ; Small Ore and Pulverized Sub- stances ; Sampling while weighing PAGE 17 18 • 19 20 20 21 17 ...
... weighed ; Samples by Rasping ; Slag Sampies ; Heterogeneous Fragments ; Sam- pling by the Crossing Method • Sampling by Dropping the Ore ; Small Ore and Pulverized Sub- stances ; Sampling while weighing PAGE 17 18 • 19 20 20 21 17 ...
Page xi
... Weighing the Assay Sample Charging ; Cupelling ; Flattening ( Laminating ) the Button Boiling in Nitric Acid · Washing ( rinsing off ) the Rolls ; Drying and Annealing of the Rolls . Weighing of the Rolls ; Loss of Gold in Cupelling ...
... Weighing the Assay Sample Charging ; Cupelling ; Flattening ( Laminating ) the Button Boiling in Nitric Acid · Washing ( rinsing off ) the Rolls ; Drying and Annealing of the Rolls . Weighing of the Rolls ; Loss of Gold in Cupelling ...
Page 18
... weighed directly , in volumetric assays it is calculated from certain reactions of the reagents employed , and the result may possibly be vitiated on account of the presence of foreign substances , of whose presence there is not always ...
... weighed directly , in volumetric assays it is calculated from certain reactions of the reagents employed , and the result may possibly be vitiated on account of the presence of foreign substances , of whose presence there is not always ...
Page 20
... weighed . -Pieces are taken at random from every lot weighed , and the collected pieces comminuted and reduced according to paragraph a ( Upper Harz copper pyrites ) . 7. Samples by rasping . - Fuels , etc. , which cannot be pulverized ...
... weighed . -Pieces are taken at random from every lot weighed , and the collected pieces comminuted and reduced according to paragraph a ( Upper Harz copper pyrites ) . 7. Samples by rasping . - Fuels , etc. , which cannot be pulverized ...
Page 21
... weighing . - The small ore must be carefully mixed , and , in case it should be rich , it is best to have it in such a ... weighed , and placed in wooden troughs standing near the scale . All the samples taken from one lot are mixed ...
... weighing . - The small ore must be carefully mixed , and , in case it should be rich , it is best to have it in such a ... weighed , and placed in wooden troughs standing near the scale . All the samples taken from one lot are mixed ...
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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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