A geological inquiry respecting the water-bearing strata of the country around London, with reference especially to the water-supply of the metropolis |
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... RAIN - ON THE QUANTITY INFILTRATING BENEATH THE SURFACE - ON THE POWER OF ABSORPTION AND ON THE PERMEABILITY OF THE WATER - BEARING STRATA • 108 • 12. ON THE VOLUMES , DIMENSIONS , AND CAPACITY FOR WATER OF THE SEVERAL WATER - BEARING ...
... RAIN - ON THE QUANTITY INFILTRATING BENEATH THE SURFACE - ON THE POWER OF ABSORPTION AND ON THE PERMEABILITY OF THE WATER - BEARING STRATA • 108 • 12. ON THE VOLUMES , DIMENSIONS , AND CAPACITY FOR WATER OF THE SEVERAL WATER - BEARING ...
Page 4
... rain and snow falling upon the surface generally , -the other from streams produced by the melting of snow in mountain districts . The latter is not within the range of this inquiry . The removal of the rain water from the immediate sur ...
... rain and snow falling upon the surface generally , -the other from streams produced by the melting of snow in mountain districts . The latter is not within the range of this inquiry . The removal of the rain water from the immediate sur ...
Page 5
... rain will pass into the interior of the strata , to be rendered back again , naturally by springs , or ar- tificially by wells . 6. There are two primary geological conditions upon which the quantity of water that may thus be supplied ...
... rain will pass into the interior of the strata , to be rendered back again , naturally by springs , or ar- tificially by wells . 6. There are two primary geological conditions upon which the quantity of water that may thus be supplied ...
Page 6
... rain - water falling upon it would be carried off into the usual surface channels , or would remain on the surface , until removed by evaporation into the atmosphere . * But this clay is very frequently covered by an irregular bed of ...
... rain - water falling upon it would be carried off into the usual surface channels , or would remain on the surface , until removed by evaporation into the atmosphere . * But this clay is very frequently covered by an irregular bed of ...
Page 7
... rain- water is at once absorbed , and permeates freely through them . The infiltration is in proportion to the absence of any admixture of clay in the mass of the sands . But if , instead of this incohesive structure , the strata should ...
... rain- water is at once absorbed , and permeates freely through them . The infiltration is in proportion to the absence of any admixture of clay in the mass of the sands . But if , instead of this incohesive structure , the strata should ...
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Common terms and phrases
alkaline appear arenaceous argillaceous Artesian average Bedfordshire beds beneath London bore Buckinghamshire calcareous Cambridgeshire carbonate of lime carbonic acid chalk marl considerable Cretaceous crop Degousée depth Devizes division Dorking drainage drift escarpment extent fall fault feet thick fissures flow formation France gallons of water Gault geological Godstone grains gravel green Grenelle ground Guildford height hills impermeable inches iron Kent lithological character London clay Lower Greensand Lower Tertiary sands Lower Tertiary strata mass Merstham mineral mottled clays nearly neighbourhood North Downs observations Oolite outcrop Oxfordshire Paris pass permeable portion probably proportion quantity of water rain rain-fall Reigate rise river rocks Saffron Walden salts sections siliceous soluble springs square miles subterranean sunk superficial area supply of water surface Surrey Tertiary district Thames tract traversed underground Upper Greensand valley varies water-bearing deposit water-bearing strata water-level water-supply Watford whilst
Popular passages
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.