mtfiutm THE ADVOCATE OF INDUSTRY, AND JOURNAL OF SCIENTIFIC, MECHANICAL AND OTHER IMPROVEMENTS. [NUMBER 29. VOLUME IX.] NEW-YORK APRIL 1, 1854. SCIENTIFIC AMERICAN, HOLMES' PATENT DERRICK. PUBLISHED WEBKL7, … cap and boom can be carried round the circle for working the whole machinery. This der- The annexed engraving is a perspective view satisfaction as to its utility and safety. Per- together, and by placing the working machine- rick can be worked by hand, horse, or steam of the improved Derrick of…
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