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 8
... inches in diameter at top for about 300 feet , when strata of water - bearing sands were met with . A triple layer of wood was used for lining the sides of the shafts , the decay of which has caused their stoppage by the falling in of ...
... inches in diameter at top for about 300 feet , when strata of water - bearing sands were met with . A triple layer of wood was used for lining the sides of the shafts , the decay of which has caused their stoppage by the falling in of ...
Page 19
... inches of loose earth . + Drift is a term applied to superficial accumulations of gravel , clay , sand , or brick- earth , which are usually , but not always unstratified , and dispersed with much irre- gularity over the face of almost ...
... inches of loose earth . + Drift is a term applied to superficial accumulations of gravel , clay , sand , or brick- earth , which are usually , but not always unstratified , and dispersed with much irre- gularity over the face of almost ...
Page 20
... inches , then each square mile will receive a daily average of 950,947 gallons of rain water . It is , therefore , a matter of essential importance to ascertain , with as much accuracy as possible , the extent of exposed surface of any ...
... inches , then each square mile will receive a daily average of 950,947 gallons of rain water . It is , therefore , a matter of essential importance to ascertain , with as much accuracy as possible , the extent of exposed surface of any ...
Page 21
... inch to the mile ) , and weighing the superficial area of each deposit . Knowing the weight of a square of 100 miles , cut out of the same paper , it is easy to estimate roughly the area in square miles of any other surface , whatever ...
... inch to the mile ) , and weighing the superficial area of each deposit . Knowing the weight of a square of 100 miles , cut out of the same paper , it is easy to estimate roughly the area in square miles of any other surface , whatever ...
Page 23
... in Proc . Geol . Soc . Vol . II . p . 450 . + This section , as well as those in Figs . 4 to 7 , is upon a vertical scale of fifty feet to the inch . In the ballast pits at the west end of Woolwich. OF WATER - BEARING STRATA . 23.
... in Proc . Geol . Soc . Vol . II . p . 450 . + This section , as well as those in Figs . 4 to 7 , is upon a vertical scale of fifty feet to the inch . In the ballast pits at the west end of Woolwich. OF WATER - BEARING STRATA . 23.
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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.