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 5
... superficial area presented by these deposits , whereby the quantity of rain - water received on their surface in any given time , is determined : - 2nd . The lithological character and thickness of the strata , whereby the proportion of ...
... superficial area presented by these deposits , whereby the quantity of rain - water received on their surface in any given time , is determined : - 2nd . The lithological character and thickness of the strata , whereby the proportion of ...
Page 11
... district under review . London stands on Tertiary strata , -beneath which expe- rience has ... superficial areas which the different members of these two groups ... area , of which the base extends from Deal in Kent to Orford in Suffolk ...
... district under review . London stands on Tertiary strata , -beneath which expe- rience has ... superficial areas which the different members of these two groups ... area , of which the base extends from Deal in Kent to Orford in Suffolk ...
Page 14
... district is not enough . Exact phy- sical details of structure , volume , and superficial area , are necessary . Although the boundary lines of many of the Secondary formations in the west and north of England are laid down upon our ...
... district is not enough . Exact phy- sical details of structure , volume , and superficial area , are necessary . Although the boundary lines of many of the Secondary formations in the west and north of England are laid down upon our ...
Page 18
... superficial area occupied by the water - bearing deposit . Second . The lithological character and thickness of the water - bearing deposit , and the extent of its underground range . Third . The position of the outcrop of the deposit ...
... superficial area occupied by the water - bearing deposit . Second . The lithological character and thickness of the water - bearing deposit , and the extent of its underground range . Third . The position of the outcrop of the deposit ...
Page 21
... surface formed by the outcropping of any deposit in a country of hill and valley is necessarily extremely irregular , and it would be difficult to measure , in the ordinary way , the area of such a district ; I have therefore used ...
... surface formed by the outcropping of any deposit in a country of hill and valley is necessarily extremely irregular , and it would be difficult to measure , in the ordinary way , the area of such a district ; I have therefore used ...
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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.