The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General Literature, 6. köideThomas Spencer Baynes C. Scribner's Sons, 1878 |
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Page 81
... cobalt in colouring glass was only dis- covered in 1540 by Scheurer , and till then the metal had been supposed to be worthless . It was first produced , but in an imperfectly purified condition , in 1733 , by Brandt . Cobalt is found ...
... cobalt in colouring glass was only dis- covered in 1540 by Scheurer , and till then the metal had been supposed to be worthless . It was first produced , but in an imperfectly purified condition , in 1733 , by Brandt . Cobalt is found ...
Page 82
... cobalt . There are two principal oxides . The protoxide , CoO , is obtained as a black powder by calcining the hydrate CoH2O2 . The latter is a red substance obtained by pre- cipitation with ... cobalt is produced chiefly as an 82 COBALT.
... cobalt . There are two principal oxides . The protoxide , CoO , is obtained as a black powder by calcining the hydrate CoH2O2 . The latter is a red substance obtained by pre- cipitation with ... cobalt is produced chiefly as an 82 COBALT.
Page 83
... cobalt is produced chiefly as an accessory in the treatment of nickel ores . These consist chiefly of mixtures of small quantities of the purer minerals with pyrites , sulphuretted copper ores , or lead and silver ores , which require ...
... cobalt is produced chiefly as an accessory in the treatment of nickel ores . These consist chiefly of mixtures of small quantities of the purer minerals with pyrites , sulphuretted copper ores , or lead and silver ores , which require ...
Page 284
... Cobalt Hamplo W.Meriden Meriden West Cheshire Watert Watertown Oak Fille Water- ville Woodbury Quasseraud Pd . Waterbury Mildlebur Union / City Prospect Naugatuck Cheshire Southlyra N E WBeacon Hawleyville Tauptóne New - Sandy town Hook ...
... Cobalt Hamplo W.Meriden Meriden West Cheshire Watert Watertown Oak Fille Water- ville Woodbury Quasseraud Pd . Waterbury Mildlebur Union / City Prospect Naugatuck Cheshire Southlyra N E WBeacon Hawleyville Tauptóne New - Sandy town Hook ...
Page 349
... Cobalt , and Manganese . Tin and Arsenic ........... Sulphur ........ 98.4 די .3 .. ........ .4 +2 100.0 To make select copper , the roasting is carried on until about one - fourth of the copper in the regulus is reduced ; the furnace ...
... Cobalt , and Manganese . Tin and Arsenic ........... Sulphur ........ 98.4 די .3 .. ........ .4 +2 100.0 To make select copper , the roasting is carried on until about one - fourth of the copper in the regulus is reduced ; the furnace ...
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