ulturists, Chemists, Engineers, Me- Address: The American Writing The information these volumes contain renders the chanics, Builders, men of leisure, and professional Machine Co., Hartford, Conn; work almost indispensable to the architect and builder, FRICTION PULLEYS CLUTCHES and ELEVATORS men,… … Illustrated eatalogue, price PLEMENT, No. 635. Price 10cents. To be had at this lists and discount sheets Contained in SCIENTIFIC AMERICAN SUPPLEMENT, sent office and from ail newsdealers. ‘ on reauest. free of charge to any address. : MUNN & CO. 361 Brondway, New York. rts MARINE SIGNALS. —…
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