How Wells are Sunk.

Issue 22 and Volume 1889 6.

How Wells are Sunk. Having determined the volume of earth to be removed from any required excavation, writes David W. King in one of a series of articles contributed to our architectural contemporary, Building, the next step is to ascertain the character of the earth-work to be excavated, whether it be sand, clay, gravel or rock. This may often be decided by taking note of the surrounding country and of the excavations previously made in the immediate neighborhood. This, however, cannot always be relied upon; the only sure way is to sink trial shafts, which may be done by means of a steel prospecting auger (figs. 26 and 27) from two and one-half to seven inches in diameter. This auger is made with a removable casing or cylinder, and a valve at the bottom for boring in sand. The hollow cylinder slides vertically along the rod, but the screw is…

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