the boiler, and that it can be removed, inspected and replaced by an ordinary workman in about two hours. The object of the appliance is to increase the water circulation and facilitate steam generation by giving greater freedom to the gas-con- taining globules formed on the heating surfaces. It is…
Shipbuilding -- Periodicals · Shipbuilding industry -- Periodicals
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
