Economic Geology: Or, Geology in Its Relations to the Arts and ManufacturesW. Blackwood and sons, 1874 - 336 páginas |
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Página 20
... solution , and appearing as incrustations of greater or less thickness . ( Carbonaceous and Bituminous Group . ) Coal is a well - known substance , and may be briefly described as miner- alised vegetable matter , containing more or less ...
... solution , and appearing as incrustations of greater or less thickness . ( Carbonaceous and Bituminous Group . ) Coal is a well - known substance , and may be briefly described as miner- alised vegetable matter , containing more or less ...
Página 21
... solution by all sea - water and brine springs . Nitrates of Soda and Potash ( natron , trona , saltpetre , & c . ) occur as in- crustations and efflorescences in many plains , marshes , and lakes in hot countries . Such deposits or ...
... solution by all sea - water and brine springs . Nitrates of Soda and Potash ( natron , trona , saltpetre , & c . ) occur as in- crustations and efflorescences in many plains , marshes , and lakes in hot countries . Such deposits or ...
Página 41
... solution — becomes a manure . The manures obtained from the mineral kingdom are very numerous , but the most important and abundant are those of a carbonaceous , calcareous , and saline nature , yielding to the growing plant carbon ...
... solution — becomes a manure . The manures obtained from the mineral kingdom are very numerous , but the most important and abundant are those of a carbonaceous , calcareous , and saline nature , yielding to the growing plant carbon ...
Página 43
... solution by the carbonated rain - water supplies to the soil an important element of fertility . Con- sidering the vast amount of this material which lies scattered along our shores , and which is easily manipulated , it looks like ...
... solution by the carbonated rain - water supplies to the soil an important element of fertility . Con- sidering the vast amount of this material which lies scattered along our shores , and which is easily manipulated , it looks like ...
Página 45
... solution , and the main value of a manure ( other things being equal ) is its capability of being dissolved by the moisture of the soil according to the requirements of the crop to which it is applied . What is termed osite , Sombrero ...
... solution , and the main value of a manure ( other things being equal ) is its capability of being dissolved by the moisture of the soil according to the requirements of the crop to which it is applied . What is termed osite , Sombrero ...
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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