Water Supply: The Present Practice of Sinking & Boring Wells; with Geological Considerations & Examples of Wells ExecutedE. & F.N. Spon, 1875 - 217 pages |
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
9 inches Artesian beds Black Sand Blue Clay bore-hole boring rod boring tool boring-head bottom Brewery brick brickwork bucket Butte-aux-Cailles Chalk Chalk Marl chisel Dead Sand deposit Ditto 99 drift engine excavation feet 6 inches feet deep feet O.D. fissures flints gallons a day gallons a minute gault gault clay grapnel gravel Green Grey Chalk GYPSUM Herts Hill hole inches diameter inches in diameter iron cylinders joints length Light Blue Loam London clay lower greensand marl Micaceous Mottled Clay OOLITE outcrop Oxford clay Paris basin Passy permeable pipe piston Plan Ponders End pump quantity of water rainfall READING BEDS Red Clay RED SAND red sandstone rock rope Sand Dark Sand SAND STONE Sandy Clay screwed shaft Shells shown in Fig sinking steining strata stratum stroke sunk surface tamping trepan tubbing tube Upper Greensand valve vertical water-bearing strata Waterworks Winchfield wrought-iron yield
Fréquemment cités
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Page 23 - ... as rain. (2) Select a place where the snow has not drifted, invert the funnel, and turning it round, lift and melt what is enclosed.
Page 85 - Fig. 3, and is single-acting, being used only to lift the boring rod at each stroke, and the rod is lowered again by releasing the steam from the top side of the piston ; the stroke is limited by timber stops both below and above the end of the working beam B. The...
Page 24 - ... by an impervious stratum, and in which, consequently, one boundary at least of the drainage area depends on the figure of the impervious stratum, being, in fact, a ridge-line on the upper surface of that stratum, instead of on the ground, and very often marking the upper edge of the outcrop of that stratum. If the porous stratum is partly covered by a second impervious stratum, the nearest ridge-line on the latter stratum to the point where the porous stratum crops out, will be another boundary...
Page 100 - ... always an elastic cushion of steam of that thickness for the piston to fall upon. The valves are opened and shut by a selfacting motion derived from the action of the piston itself, and as it is of course necessary that motion should be given to it before such a result can ensue, a small jet of steam is allowed to be constantly blowing into the bottom of the cylinder; this causes the piston to move slowly at first, so as to take up the rope, and allow it to receive the weight of the boring- rod...
Page 58 - ... arms, both of wrought iron, with the exception of the teeth of the cutting part, which are of cast steel. The frame has at the bottom a series of holes, slightly conical, into which the teeth are inserted, and tightly wedged up, Fig.