Industry : a magazine devoted to science, engineering, and the mechanic arts, especially on the Pacific Coast (1888)
San Francisco : Industrial Pub. Co. · leaf 738
720 CONSTRUCTIVE ENGINEERING. … DIRECT-ACTING- DOUBLE AIR PUMPS. DOW STEAM PUMP WORKS, SAN FRANCISCO. The above is one modification out of a number made at the works. — Speed at absolute control. — Reciprocating parts light, and resistance elastic. — No dead centers, or limit of speed. — Engine is controlled by a sensitive…
Industrial arts · Technology
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
