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Scientific American, Vol. 59, No. 11 (1888) (1888)
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wells of the company are now sunk to a a gear wheel turning on a stud secured on the weighted of funds. The latest project is to abandon the dead depth of from 1,600 to 1,800 feet. The oil is of the lever. A spring pawl onthe lever arm engages the canal for a time and to construct a temporary lock… … PROJECTOR OF THE PANAMA CANAL, © 1888 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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