A Manual of Practical AssayingLongmans, Green, and Company, 1868 - 697 páginas |
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Página xxxiv
... grains , contained in a tone of ore , & c . , from the weight of metal obtained in an assay of 200 grains of mineral PAGE ii - xix XX xxi - xxxii xxxiii xxxiv - xlvii MANUAL OF PRACTICAL ASSAYING . CHAPTER I. CHEMICAL NOMENCLATURE ...
... grains , contained in a tone of ore , & c . , from the weight of metal obtained in an assay of 200 grains of mineral PAGE ii - xix XX xxi - xxxii xxxiii xxxiv - xlvii MANUAL OF PRACTICAL ASSAYING . CHAPTER I. CHEMICAL NOMENCLATURE ...
Página 20
... grains are carried farthest ; and , lastly , with equal densities and volumes the particles exposing most surface traverse the greatest space . It is , therefore , evident that the most advantageous con- dition for separating , by ...
... grains are carried farthest ; and , lastly , with equal densities and volumes the particles exposing most surface traverse the greatest space . It is , therefore , evident that the most advantageous con- dition for separating , by ...
Página 23
... grain . This may be of the form of the bankers ' or bullion balance ( fig . 11 ) , and may be employed in weighing ... grains in each pan , and turn with one - tenth of a grain . This serves for weighing samples of ore and fluxes for ...
... grain . This may be of the form of the bankers ' or bullion balance ( fig . 11 ) , and may be employed in weighing ... grains in each pan , and turn with one - tenth of a grain . This serves for weighing samples of ore and fluxes for ...
Página 24
... grains ; must turn distinctly and FIG . 12 . FIG . 13 . d of minerals containing gold and silver ; also for general. accurately with the Tooth of a grain . This is employed in the assay of gold and silver bullion , and in the assay. 24 ...
... grains ; must turn distinctly and FIG . 12 . FIG . 13 . d of minerals containing gold and silver ; also for general. accurately with the Tooth of a grain . This is employed in the assay of gold and silver bullion , and in the assay. 24 ...
Página 28
... grain , with 1000 grains in each pan , or with 1ooooooth of the weight it carries , it may be considered perfect . 000 The friction of the knife edges must be as slight as possible . Most of the faults in the working of a balance , if ...
... grain , with 1000 grains in each pan , or with 1ooooooth of the weight it carries , it may be considered perfect . 000 The friction of the knife edges must be as slight as possible . Most of the faults in the working of a balance , if ...
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added alloy ammonia amount antimony aqua regia arsenic ascertained assay bismuth black flux blowpipe boiling borax button calcined carats carbonate of soda carbonic acid cent charcoal chloride of silver clay cobalt colour combustion containing cooling copper Crown 8vo crucible cubic cubic centimetres cupel decomposed dilute dissolved Edition employed excess filter flame flask fluid fuel furnace fused fusible fusion gives glass globule gold grains grammes heat hydrochloric acid ignited inches iron lime liquid litharge manganese matter melted mercury metal method mineral mixed mixture muffle nickel nitrate nitric acid normal solution obtained operation Ounce oxide oxide of lead oxidising oxygen permanganate peroxide pipette placed plate platinum potash potassium powder precipitate produced proportion protoxide pulverised pure readily reduced roasting salt silica slag small quantity sodium specific gravity substance sulphate of lead sulphide sulphuric acid temperature thousandths tion tube vessel washed weight Woodcuts zinc
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