Economic Geology: Or, Geology in Its Relations to the Arts and ManufacturesW. Blackwood and sons, 1874 - 336 páginas |
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Página xiii
... according to the earths and metals from which they are prepared . XVII . GEMS AND PRECIOUS STONES , I. THE CARBON GROUP , Diamond , Bort , Carbonado . Amber , Ambrite . Jet , Bogwood , Cannel - Coal . 2. THE ALUMINA GROUP , Corundum ...
... according to the earths and metals from which they are prepared . XVII . GEMS AND PRECIOUS STONES , I. THE CARBON GROUP , Diamond , Bort , Carbonado . Amber , Ambrite . Jet , Bogwood , Cannel - Coal . 2. THE ALUMINA GROUP , Corundum ...
Página 1
... according to their composition , relative positions , and fossil contents ; endeavouring to deduce therefrom a connected his- tory of our globe and its successive aspects from the earliest to the most recent times . In its practical ...
... according to their composition , relative positions , and fossil contents ; endeavouring to deduce therefrom a connected his- tory of our globe and its successive aspects from the earliest to the most recent times . In its practical ...
Página 11
... according to the appearance it presents . Roof- ing - slate , for example , splits up with a flat or regular surface , calcareous spar cleaves with an even or smooth face , while a piece of flint or cannel - coal breaks up with a ...
... according to the appearance it presents . Roof- ing - slate , for example , splits up with a flat or regular surface , calcareous spar cleaves with an even or smooth face , while a piece of flint or cannel - coal breaks up with a ...
Página 12
... according as it seems to approach the felspar on the one hand , or the rock - crystal on the other . A knowledge of the relative hardness of rocks and minerals is often of essential importance in the arts and manufactures , and hence ...
... according as it seems to approach the felspar on the one hand , or the rock - crystal on the other . A knowledge of the relative hardness of rocks and minerals is often of essential importance in the arts and manufactures , and hence ...
Página 18
... according to their predominating or more obvious ingredients , into the following groups . We give such explanations as may enable the non- mineralogical reader to understand their distinctive character- istics . ( Arenaceous or ...
... according to their predominating or more obvious ingredients , into the following groups . We give such explanations as may enable the non- mineralogical reader to understand their distinctive character- istics . ( Arenaceous or ...
Outras edições - Ver tudo
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
abundant admixture agricultural alumina amount antimony arsenic artificial arts and manufactures basalts beds bismuth bituminous blocks borax Britain calcareous carbonate carbonic acid Carboniferous cements chalk chemical chiefly chloride clay coal colour compact composition consists containing copper crust crystalline crystals deposits Derbyshire districts durable earth employed engineer extensively felspar fire-clay formations gems geologist Geology gold granites greenstones grits gypsum hard heat hence hydraulic ingredients iron ironstones known lignites lime limestones lustre magnesia manganese manures marbles masses material metamorphic mineral and metallic mortar nature obtained occasionally occur Oolite ornamental oxide peat pigments polishing 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 springs stones strata stratified structure substances sulphate sulphide sulphuric acid surface tertiary texture thickness tints tion tons usually varieties various vary veins volcanic yellow yield zinc