Sanitary Work In The Smaller Towns And In Villages by Charles SlaggSanitary Work In The Smaller Towns And In Villages by Charles Slagg

Sanitary Work In The Smaller Towns And In Villages

byCharles Slagg

Paperback | October 12, 2012

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 edition. Excerpt: ...depth, is immediately filled with water. Again, it will be observed, that a part of the London clay district, close to the metropolis, lies below the line of saturation. This is precisely the condition under which artesian wells may be expected to yield a stream of water that will overflow the surface. On boring down through the London clay, D, to the chalk on either side of the fault No. 2, we come to water which is acted on by the pressure from Tring or Knockholt as the case may be, and which, as soon as the boring is effected, rushes up through it and rises above the surface, namely, to the the line c d. This is the explanation of many overflowing artesian wells in the neighbourhood of Fulham, Brentford, and other places in the valley of the Thames." Published in Vol. yi. of the Quarterly Journal of the Geological Society, p. 440. Common wells, though they may be deep, depend for their water upon the area immediately surrounding them, the rainwater falling upon which sinks downwards and laterally towards the bottom of the well, and the quantity procurable may be likened to the contents of a cone, the base of which is the area round the well, and its apex the bottom of the well, the contents being renewed from time to time as the rain falls. The extent of this area, or base of the inverted cone, is the greater the more porous the ground is, for any given depth of well, for there is in every kind of ground a minimum horizontality which the water can assume, under any given degree of exhaustion by pumping, its percolation to the well being hindered by the density of the ground through which it passes, and the greater the density the steeper the incline assumed by the sides of the water cone. In practice these theoretical deductions are...
Title:Sanitary Work In The Smaller Towns And In VillagesFormat:PaperbackDimensions:80 pages, 9.69 × 7.44 × 0.17 inPublished:October 12, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217986757

ISBN - 13:9780217986755