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Scientific American, Vol. 33, No. 4 (1875) (1875)

leaf 7

An illustration from Scientific American, Vol. 33, No. 4 (1875), 1875, leaf 7
Scientific American. 54 [JuLy 24, 1875. ARTESIAN WELLS. needs pass at an acute angle through presented in Fig. 7. It consists mere- few layers of rock; 3, alternation of ly of a worm, which screws around porous and impervious strata beneath … ARTESIAN WELL, depth is 4,194 feet. In the Desert of consumption. GRENELLE, PARIS, FRANCE, Sahara some seventy-five shafts have McMahen's been sunk, which yield a aggregate of Auger, Fig. 7. in alternately raising and depressing the tool to give it the nuted rock or earth below, the latter enters…

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