Water Supply: The Present Practice of Sinking and Boring Wells, with Geological Considerations and Examples of Wells ExecutedSpon, 1875 - 217 pages |
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Page 10
... fixed level . It is also impossible to discover by a surface examination where the fissures may be struck by a boring . For purposes of water supply , therefore , these rocks are of little importance . It must be remarked here , however ...
... fixed level . It is also impossible to discover by a surface examination where the fissures may be struck by a boring . For purposes of water supply , therefore , these rocks are of little importance . It must be remarked here , however ...
Page 24
... fixed that it will remain so ; it should never be less than 6 inches above the ground , nor more than 1 foot except when a greater elevation is absolutely necessary to obtain a proper exposure . " It must be set on a level piece of ...
... fixed that it will remain so ; it should never be less than 6 inches above the ground , nor more than 1 foot except when a greater elevation is absolutely necessary to obtain a proper exposure . " It must be set on a level piece of ...
Page 58
... fixed upon the same rods above the mizer , and is used simultaneously , being raised and lowered with that tool . The cutting end of the picker is frequently replaced by a scratcher , Figs . 44 , 45. This useful tool rakes or scratches ...
... fixed upon the same rods above the mizer , and is used simultaneously , being raised and lowered with that tool . The cutting end of the picker is frequently replaced by a scratcher , Figs . 44 , 45. This useful tool rakes or scratches ...
Page 64
... fixed at the top of the box , which rise and permit the end of the rod to pass when the box is lowered , but upon raising it the palls fall and grip the rod firmly . A spiral angular worm , similar to Fig . 57 , is also applied for ...
... fixed at the top of the box , which rise and permit the end of the rod to pass when the box is lowered , but upon raising it the palls fall and grip the rod firmly . A spiral angular worm , similar to Fig . 57 , is also applied for ...
Page 65
... fixed at the top , as required , for adjust- ing the rods at a convenient height . Fig . 63 . Fig . 64 . Fig . 65 . Fig . 66 . Fig . 63 is a hand - dog ; Figs . 64 and 65 , a lifting dog ; Fig . 66 , the tillers or handles by which the ...
... fixed at the top , as required , for adjust- ing the rods at a convenient height . Fig . 63 . Fig . 64 . Fig . 65 . Fig . 66 . Fig . 63 is a hand - dog ; Figs . 64 and 65 , a lifting dog ; Fig . 66 , the tillers or handles by which the ...
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Autres éditions - Tout afficher
Water Supply: The Present Practice of Sinking and Boring Wells. With ... Ernest Spon Affichage du livre entier - 1885 |
Water Supply: The Present Practice of Sinking and Boring Wells. With ... Ernest Spon Affichage du livre entier - 1885 |
Water Supply: The Present Practice of Sinking and Boring Wells, with ... Ernest Spon Affichage du livre entier - 1875 |
Expressions et termes fréquents
Banister Fletcher beds Blue Clay Boilers bore-hole boring rod boring tool boring-head bottom Brewery brick brickwork bucket Butte-aux-Cailles cast-iron chalk chisel Civil Engineers cloth CONTENTS Construction crown 8vo cuts depth Ditto Edmund Sharpe excavation feet deep feet O.D. flints foot Formulæ gallons a day gallons a minute grapnel gravel greensand Grey Hedgerley hole Hydraulic illustrated inches diameter Isometric Projection joint Keuper length lever London clay lower Lower Tertiary Machinery Marl means Mechanical Memoranda mottled clays numerous OOLITE outcrop passed Passy Pebbles pipe piston plates Pocket-Book post 8vo pump quantity Railway rainfall READING BEDS RED SAND red sandstone River rock rope royal 8vo Screw Propeller screwed second edition sewed shaft shell shown in Fig sinking Slide Steam steining stone strata stratum stroke sunk surface Surface Condensers Tables thickness tion trepan tubbing tube upper valve vertical water-bearing strata Waterworks weight wood engravings wrought-iron yield
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