rimtifo THE ADVOCATE OF INDUSTRY, Aim JOURNAL OF SCIENTIFIC, MECHANICAL AND OTHER IMPROVEMENTS. [NUMBER 37. NEW-YORK MAY 27, 1854. VOLUME IX.] PORTABLE DAM FOR CALIFORNIA.—Figure 1. … i« the usual manner. The dam being made in on which the posts, I I, of the windlasse* are axles in proper foot bearings, they are raised The annexed engravings are views of a New sections can be operated and managed with a secured. These have pivot foot rests, a, below, and lowered with comparative…
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