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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Page 2
... supply of water than that furnished by those which exist at pre- sent . * 2. The limpidity and freedom from organic impurities of the deep well water in the London Tertiary district , † and its * It would be difficult to account for the ...
... supply of water than that furnished by those which exist at pre- sent . * 2. The limpidity and freedom from organic impurities of the deep well water in the London Tertiary district , † and its * It would be difficult to account for the ...
Page 3
... supply . 3. The objects proposed in the following pages are , there- fore , * . First . To inquire into those geological conditions of structure in the water - bearing formations which determine their capacity and water - value . Second ...
... supply . 3. The objects proposed in the following pages are , there- fore , * . First . To inquire into those geological conditions of structure in the water - bearing formations which determine their capacity and water - value . Second ...
Page 4
... water - supply in other Tertiary and Secondary districts . 4. As no Artesian wells in London have as yet been carried through the chalk , it remains to be determined what would be the result of such an operation ; and this part of the ...
... water - supply in other Tertiary and Secondary districts . 4. As no Artesian wells in London have as yet been carried through the chalk , it remains to be determined what would be the result of such an operation ; and this part of the ...
Page 6
... water falling upon it would be carried off into the usual surface channels ... water , and yet porous enough to allow of the ready removal , by infiltration ... supply ( by means of shallow wells ) over large tracts of country . 8. If ...
... water falling upon it would be carried off into the usual surface channels ... water , and yet porous enough to allow of the ready removal , by infiltration ... supply ( by means of shallow wells ) over large tracts of country . 8. If ...
Page 8
... water therein will tend to rise through the opening to a height ... water will not only rise to the sur- face , but may overflow . It is to this last ... supply , that the water from these sands not only rose through the bore in ...
... water therein will tend to rise through the opening to a height ... water will not only rise to the sur- face , but may overflow . It is to this last ... supply , that the water from these sands not only rose through the bore in ...
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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.