A geological inquiry respecting the water-bearing strata of the country around London, with reference especially to the water-supply of the metropolisJ. Van Voorst, 1851 - 240 pages |
Autres éditions - Tout afficher
A Geological Inquiry Respecting the Water-bearing Strata of the Country ... Sir Joseph Prestwich Affichage du livre entier - 1895 |
A Geological Inquiry Respecting the Water-bearing Strata of the Country ... Joseph Prestwich Affichage du livre entier - 1851 |
A Geological Inquiry Respecting the Water-Bearing Strata of the Country ... Joseph Prestwich Aucun aperçu disponible - 2017 |
Expressions et termes fréquents
absorbed appear Artesian average base become beds bore carbonate causes chalk character clay comparatively consequently considerable considered consist containing continued course deposit depth direction distance district disturbance division east effective exist experiments extent fact fall fault feet fissures flow formation France further gallons Gault geological give given greater green ground hardness height hills Illustrations important inches increase iron Kent latter less lime London London clay Lower Greensand Lower Tertiary strata mass means measure mineral natural nearly observations obtained origin outcrop Paris pass permeable portion position present probably proportion quantity quantity of water question rain range reference remain rise river rocks salts sands sources springs square miles sufficient supply of water surface Surrey taken Tertiary sands thickness Upper Greensand valley varies water-bearing whole
Fréquemment cités
Page 164 - DEGREES OF HARDNESS AND DEGREES OF ALKALINITY EXPLAINED. Degrees of Hardness. — Each degree of hardness indicates as much hardness as would be produced by one grain of chalk per gallon held in solution in the form of bicarbonate of lime, free from any excess of carbonic acid. The degree of hardness caused by a lime salt depends, not on the state of combination of the calcium it contains, but on the quantity of the calcium.