Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 529
3311 %0£&&&%&i&& … shown. The object in this constructionis to substitute compressed air for themechanism used by Walcker, therebygaining lightness of touch, accessibilityto the valves from below by simply re-moving the bottom boards B, non-lia-bility to derangement from atmosphericchanges, no parts to be regulated,…
Mechanical engineering -- Dictionaries
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