Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 800
fered by these valves, is the larger opening for the passage of the water than is afforded by the valves of the forms hitherto in use, while at the same time the liftis reduced, and consequently the concussion very considerably lessened. VALVES, BALANCED—Stevens Improvements, 1851. The patentees…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
