A Handbook to the Mineralogy of Cornwall and Devon: With Instructions for Their Discrimination and Copious Tables of Localities |
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Common terms and phrases
acid alumina analysis Angles Anglesite anhydride Anhydrous antimony arsenic Axinite bead of copper Bismuth Blende blowpipe blue borax Botallack Breage brittle brown brownish Calcedony Calcite carbonate Carn Cassiterite cent Cerussite Chalcocite Chalcopyrite Chalybite charcoal Chlorite cleavage Clinoclase Cobalt colour Comp Copper Cornish specimens Cornwall crystals Cuprite dark decomposed Devon Dolcoath earthy Fahlerz Felspar fibrous flame Fluor formula fracture conchoidal fusible Galena Garnet green grey greyish HCl or HNO3 Hematite Hexagonal Hornblende Huel Hydrated infusible lead lime Limonite macled magnesia magnetic manganese massive matrass matrass gives Mica micro minerals mines Mispickel named occurs odour Olivenite opaque Orthoclase oxide of copper oxide of iron pearly peroxide of iron potash prisms Pseudomorphs Psilomelane Pyrites Pyrolusite Quartz rare reactions Rhombic rock Schorl silica Silver Smaltite soda soluble in HCl sometimes Spar streak white striated sulphur Torbernite translucent usually variety vitreous Wolfram yellow yields
Popular passages
Page 54 - ... 1. Talc. 6. Orthoclase. 2. GypSum. 7. Quartz. 3. Calcite. 8. Topaz. 4. Fluorite. 9. Corundum. 5. Apatite. 10. Diamond.
Page 95 - ... once what is the weight of a quantity of water, equal in bulk to the solid matter in the sand ; and by comparing this with the weight of the sand, we have its true specific gravity.
Page 77 - The organic constituent of this substance (pigotite), the author considers to be derived from the decay of the various plants which grow on the moist moorlands above, and which, being carried by the waters into the fissures of the granite beneath, combines with the alumina of the decomposed felspar ; and when it reaches the air, deposits itself on the roof and sides of the caverns, in the form of layers, varying from a line to two or three inches in thickness.