A Manual of Practical AssayingLongmans, Green, and Company, 1868 - 697 páginas |
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Página xxviii
... temperature varies , 520. Table of correction for variations in temperature of the normal salt solutions , 522 . Table for the assay , by the wet method , of an alloy containing any proportions whatever of Silver , by the employment of ...
... temperature varies , 520. Table of correction for variations in temperature of the normal salt solutions , 522 . Table for the assay , by the wet method , of an alloy containing any proportions whatever of Silver , by the employment of ...
Página 38
... temperature , so as , for instance , to render minerals more fragile by quenching in water , & c . Thus , we speak of the calcination of minerals , as iron , or zinc , ores , & c . , whose matrices are argillaceous , to expel water ...
... temperature , so as , for instance , to render minerals more fragile by quenching in water , & c . Thus , we speak of the calcination of minerals , as iron , or zinc , ores , & c . , whose matrices are argillaceous , to expel water ...
Página 41
... temperature unless the surface be continually renewed . Even by paying the ut- FIG . 14 . most attention to this point it cannot be always prevented , as for instance when sulphide of antimony is being roasted . In these cases the assay ...
... temperature unless the surface be continually renewed . Even by paying the ut- FIG . 14 . most attention to this point it cannot be always prevented , as for instance when sulphide of antimony is being roasted . In these cases the assay ...
Página 43
... temperature , and the mass acted on . Some oxides treated this way are reduced very readily ; others , again , take a considerable time ; while certain of them do not appear to be acted on beyond the outermost layer . Of the first class ...
... temperature , and the mass acted on . Some oxides treated this way are reduced very readily ; others , again , take a considerable time ; while certain of them do not appear to be acted on beyond the outermost layer . Of the first class ...
Página 45
... temperature . In some cases the fusion is intended to be only partial , the object being to melt out an easily fusible part of the mineral , for instance , in assaying grey antimony ore , and different bismuth ores . SOLUTION . In all ...
... temperature . In some cases the fusion is intended to be only partial , the object being to melt out an easily fusible part of the mineral , for instance , in assaying grey antimony ore , and different bismuth ores . SOLUTION . In all ...
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Términos y frases comunes
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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