Economic Geology: Or, Geology in Its Relations to the Arts and ManufacturesW. Blackwood and sons, 1874 - 336 páginas |
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Página 21
... considerable thickness and extent . Alum ( sulphate of alumina and potash ) , though chiefly extracted for commercial purposes from certain shales and schists , is also found in nature in the saline or crystallised state . Borax ...
... considerable thickness and extent . Alum ( sulphate of alumina and potash ) , though chiefly extracted for commercial purposes from certain shales and schists , is also found in nature in the saline or crystallised state . Borax ...
Página 45
... considerable part of the insoluble earthy phosphate of lime into sulphate and soluble superphosphate . Plants take in no food save in a state of solution , and the main value of a manure ( other things being equal ) is its capability of ...
... considerable part of the insoluble earthy phosphate of lime into sulphate and soluble superphosphate . Plants take in no food save in a state of solution , and the main value of a manure ( other things being equal ) is its capability of ...
Página 46
... considerable quantities were obtained from Ichaboe , and other places on the west coast of Africa ; but as absolute dryness is necessary to the preservation of the ammoniacal salts , which constitute the chief value of guano , these ...
... considerable quantities were obtained from Ichaboe , and other places on the west coast of Africa ; but as absolute dryness is necessary to the preservation of the ammoniacal salts , which constitute the chief value of guano , these ...
Página 47
... considerable magnitude . In and around salt- lakes like those of Central Asia , along dried - up lakes and deserts like those of Asia and Africa , and over extensive reaches like the salinas of South America , these salts occur in ...
... considerable magnitude . In and around salt- lakes like those of Central Asia , along dried - up lakes and deserts like those of Asia and Africa , and over extensive reaches like the salinas of South America , these salts occur in ...
Página 75
... considerable crushing power . The following are analyses as given in the Commissioners ' Report on Building- Stones , and by Richardson : - Roach Abbey . Park Nook . Fulwell . Carb . lime , · Bolsover . Huddlestone . 51. I 54.19 57.5 ...
... considerable crushing power . The following are analyses as given in the Commissioners ' Report on Building- Stones , and by Richardson : - Roach Abbey . Park Nook . Fulwell . Carb . lime , · Bolsover . Huddlestone . 51. I 54.19 57.5 ...
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Economic Geology: Or, Geology in Its Relations to the Arts and Manufactures David Page Visualização integral - 1874 |
Economic Geology: Or, Geology in Its Relations to the Arts and Manufactures David Page Visualização integral - 1874 |
Economic Geology: Or, Geology in Its Relations to the Arts and Manufactures David Page Visualização integral - 1874 |
Palavras e frases frequentes
abundance admixture agricultural alumina amount antimony arsenic arts and manufactures basalts beds bismuth bituminous blocks Britain calcareous carbonate carbonic acid Carboniferous cements chalk chemical chiefly chloride clay clayey coal colour compact composition consists containing copper crust crystalline crystals deposits districts durable earth employed engineer felspar fire-clays formations geologist Geology gold granites gravels Greensand greenstones grits gypsum hard heat hence hornblende igneous ingredients iron ironstones known largely lignites lime limestones lustre magnesia manganese manures marbles marls masses material metamorphic mineral and metallic mortar nature obtained occasionally occur Oolite ornamental oxide peat phosphate pigments polish porphyries potash preparation purposes pyrites quarries quartz require rocks saline salts sand sandstones schists serpentines shales silica Silurian silver soda sodium soft soils specific gravity stones strata stratified structure subsoils substances sulphate sulphide sulphuric acid surface tellurium tertiary texture thickness tion tons usually varieties various vary veins volcanic yield zinc