Manual of mineralogy including observations on mines, rocks, reduction of ores, and the applications of the science to the arts, with 260 illustrations, designed for the use of schools and colleges.
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actinolite affords alumina angles antimony apatite arsenic basal beryl bismuth blende blowpipe blue borax brittle brown calc spar called carbonate cent chabazite charcoal chlorid chlorite clay cleavage coal cobalt color Composition contains copper pyrites cryst crystals diamond distinguished earthy epidote feldspar fibrous flame fluor fumes furnace fuses fusible galena garnet glass globule gneiss gold granite granular gray grayish green heated hornblende idocrase Infusible iron pyrites lead lime limestone Luster vitreous magnesia magnetic iron manganese masses massive metal mica mineral mines native nearly nickel nitric acid occurs octahedrons odor opaque oxyd oxyd of iron oxygen p'ly potash pounds Prim protoxyd of iron pyroxene quartz rhombic prisms rhombohedron rocks salt scapolite serpentine silica silver slate soda sometimes species specific gravity sphene streak strl sulphate sulphuret sulphuric acid talc tourmaline translucent transparent tremolite usually variety yellow zinc
Seite 411 - Cologne, (Hamburgh, etc.,) = 8 oz. = 3608 Eng. grs. The Russian pood (or pud) = 40 Russian pounds = 36 English pounds avoirdupois. 12 inches English, 1 foot. 3 feet, 1 yard. 40 rods, 1 furlong. 8 furlongs, 1 mile. 3 miles, 1 league.
Seite 49 - I.) ; hence the sum of all the angles, both interior and exterior, is equal to twice as many right angles as there are sides to the polygon. But the sum of the interior angles alone, less four right angles, is equal to the same sum (Prop.
Seite 310 - This metal fuses readily before the "compound blowpipe :" and Dr. Hare succeeded in 1837 in melting twenty-eight ounces into one mass.* The metal was almost as malleable and as good for working as that obtained by the other process ; it had a specific gravity of 19*8. He afterwards succeeded in obtaining from the ore masses which were 90 per cent, platinum, and as malleable as the metal in ordinary...