International Library of Technology: A Series of Textbooks for Persons Engaged in the Engineering Professions and Trades, Or for Those who Desire Information Concerning Them, Volume 39, Part 2
International Textbook Company, 1908 - Agriculture
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angles antimony appearance arsenic assay bead becomes beds bismuth blowpipe blue borax brittle brown calcium called carbonate cent changes characteristic charcoal cleavage closed tube coal coat cobalt cold color colorless contains copper crystalline crystals dark deposits depth earth easily epoch faces feet flame formation forms fracture fuses gives glass gold gray green heated hexagonal hydrochloric acid insoluble iron known lateral lead less limestone Lower luster masses massive material metallic mineral moistened nickel obtained occurs odor opaque oxide pale period plane potassium precipitate present prisms produced quartz reaction reducing River rocks salt sandstone shales shown in Fig shows silicate silver soda sodium soluble solution sometimes stone streak structure sublimate substance sulphide sulphur surface tenacity termed Tests for Identification.-B. B. thick tion transparent tube Upper usually varieties vein volatile yellow yields zinc