Economic Geology: Or, Geology in Its Relations to the Arts and ManufacturesW. Blackwood and sons, 1874 - 336 páginas |
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Página viii
... employed . As it is chiefly with the raw materials - their characters and modes of occurrence that the practical geologist has to deal , com- paratively little notice has been taken of the processes by which these are converted into the ...
... employed . As it is chiefly with the raw materials - their characters and modes of occurrence that the practical geologist has to deal , com- paratively little notice has been taken of the processes by which these are converted into the ...
Página 19
... employed , from its absorbent nature , in the scouring or fulling of greasy woollens ; hence the name . Mud is the familiar as well as technical term for the fine impalpable matter worn and borne down by water , and deposited in seas ...
... employed , from its absorbent nature , in the scouring or fulling of greasy woollens ; hence the name . Mud is the familiar as well as technical term for the fine impalpable matter worn and borne down by water , and deposited in seas ...
Página 22
... employed as an ornamental stone . ( Igneous or Pyrogenous Rocks . ) Granite and Syenite . - Ordinary granite is a granular - crystalline com- pound of quartz , felspar , and mica , and variously coloured from the presence of iron in the ...
... employed as an ornamental stone . ( Igneous or Pyrogenous Rocks . ) Granite and Syenite . - Ordinary granite is a granular - crystalline com- pound of quartz , felspar , and mica , and variously coloured from the presence of iron in the ...
Página 42
... employed with wonderful results as a top- dressing to pastures , as well as to grain crops . Its fertilising properties are mainly due to the ammonia , sulphate of lime , nitric acid , and certain other ingredients which it contains ...
... employed with wonderful results as a top- dressing to pastures , as well as to grain crops . Its fertilising properties are mainly due to the ammonia , sulphate of lime , nitric acid , and certain other ingredients which it contains ...
Página 43
... employed . In the Report on the Geo- logy of Devon , Cornwall , and Somerset ( 1839 ) , it is stated that , in 1811 , Mr Worgan estimated the cost of the land car- riage of this sand in Cornwall at more than £ 30,000 per annum . Large ...
... employed . In the Report on the Geo- logy of Devon , Cornwall , and Somerset ( 1839 ) , it is stated that , in 1811 , Mr Worgan estimated the cost of the land car- riage of this sand in Cornwall at more than £ 30,000 per annum . Large ...
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