Economic Geology: Or, Geology in Its Relations to the Arts and ManufacturesW. Blackwood and sons, 1874 - 336 páginas |
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Página 44
... powder than the limestone could be by any mechanical means ; and they are chemical , inasmuch as by burning the lime is brought into a more active and caustic state , and is , at the same time , mixed with variable proportions of ...
... powder than the limestone could be by any mechanical means ; and they are chemical , inasmuch as by burning the lime is brought into a more active and caustic state , and is , at the same time , mixed with variable proportions of ...
Página 91
... powder , according to the original colour of the limestone . By the application of more water it is converted into a pulp or paste ; and this pulp , thoroughly incorporated with three or four times its own volume of clean sharp sand ...
... powder , according to the original colour of the limestone . By the application of more water it is converted into a pulp or paste ; and this pulp , thoroughly incorporated with three or four times its own volume of clean sharp sand ...
Página 92
... powder , and then worked up ( by hand or machinery ) with five or six parts of clean sharp sand into a cement . When laid on as plaster , it sets , dries , and hardens in the space of twenty - four hours , and can be finished off with a ...
... powder , and then worked up ( by hand or machinery ) with five or six parts of clean sharp sand into a cement . When laid on as plaster , it sets , dries , and hardens in the space of twenty - four hours , and can be finished off with a ...
Página 93
... powder ( the plaster of Paris of commerce ) ; and this powder , when worked into a paste with water , though plastic and pliable for a while , soon sets hard with considerable strength and solidity . This faculty of setting quickly ...
... powder ( the plaster of Paris of commerce ) ; and this powder , when worked into a paste with water , though plastic and pliable for a while , soon sets hard with considerable strength and solidity . This faculty of setting quickly ...
Página 95
... powder falls from the millstones , under the impression that it is injured by exposure to air and moisture ; others expose it for several days to cool or sweat ; but all agree that continued exposure to air and moisture is detrimental ...
... powder falls from the millstones , under the impression that it is injured by exposure to air and moisture ; others expose it for several days to cool or sweat ; but all agree that continued exposure to air and moisture is detrimental ...
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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
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