The Assayer's Manual: An Abridged Treatise on the Docimastic Examination of Ores, and Furnace and Other Artificial Products |
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Page 33
... powdered sample is spread out in a shallow , smooth roasting dish . This is 1 Gaslampen in Dingler , ccxxiv . 617 ; ccxxv . 83 ( Müncke ) . Fresenius ' Ztschr . 1879 , p . 257 ( Ebell ) . Bunsenbrenner von Glas in Dingler , ccxxvii . 85 ...
... powdered sample is spread out in a shallow , smooth roasting dish . This is 1 Gaslampen in Dingler , ccxxiv . 617 ; ccxxv . 83 ( Müncke ) . Fresenius ' Ztschr . 1879 , p . 257 ( Ebell ) . Bunsenbrenner von Glas in Dingler , ccxxvii . 85 ...
Page 36
... powdered charcoal or graphite is added to the sample before roasting , in order to shorten the time required for the operation . Very fusible sub- stances which evolve vapors ( such as " fahlerz ” contain- ing mercury ) must be heated ...
... powdered charcoal or graphite is added to the sample before roasting , in order to shorten the time required for the operation . Very fusible sub- stances which evolve vapors ( such as " fahlerz ” contain- ing mercury ) must be heated ...
Page 50
... powdered fire- clay , cupel ashes , chalk , pounded assay vessels , etc. ) , in- troducing and removing the assay vessels in the muffle , cleansing the furnace after the work is finished by draw- ing the glowing cinders from the grate ...
... powdered fire- clay , cupel ashes , chalk , pounded assay vessels , etc. ) , in- troducing and removing the assay vessels in the muffle , cleansing the furnace after the work is finished by draw- ing the glowing cinders from the grate ...
Page 67
... powdered charcoal ( see above ) . These crucibles are 45 millimeters ( 1.76 inches ) wide , and 55 millime- ters ( 2.16 inches ) high in the clear , with a total Fig . 43 . height of 90 millimeters ( 3.54 inches ) . 3. Other clay ...
... powdered charcoal ( see above ) . These crucibles are 45 millimeters ( 1.76 inches ) wide , and 55 millime- ters ( 2.16 inches ) high in the clear , with a total Fig . 43 . height of 90 millimeters ( 3.54 inches ) . 3. Other clay ...
Page 68
... powdered and washed . The dried powder , which should be about as fine as coarse wheat flour , is used for the principal mass , while a finer flour is reserved for a final coating . The cupels are formed by filling and driving the ...
... powdered and washed . The dried powder , which should be about as fine as coarse wheat flour , is used for the principal mass , while a finer flour is reserved for a final coating . The cupels are formed by filling and driving the ...
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Common terms and phrases
2.5 grammes 20 grammes added alloy ammonia ammonium antimony aqua regia argol arsenic assay sample beaker-glass bismuth black copper black flux boiled borax burette cent charcoal charge chloride coal cobalt color common salt containing copper covering of common crucible crucible Fig cubic centimeters cubic inches cupelled decanted decomposed determined diluted Dingler dried evaporated to dryness ferric oxide ferrous filtered filtrate flask fluid foreign metals Fresenius furnace fused fusion 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 meters method millimeters mixed mixture muffle muffle-furnace nickel nitric acid percentage placed platinum porcelain potassium carbonate potassium cyanide poured powdered precipitated pyrites refractory residue scorifier slag smelting sodium carbonate sodium sulphide substances sulphate sulphuretted hydrogen sulphuric acid temperature titrated tube u. h. Ztg volumetric washed weighed zinc Ztschr
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