A catechism of the steam engine in its various applications to mines, mills, steam navigation, railways, and agriculture. With practical instructions for the manufacture and management of engines of every class (1864)
Bourne, John · New York, D. Appleton & co. · leaf 245
.—Are not ah-pumpvalves now very generallymade of india rubber ? A.—They are almost in-variably so made if the en-gines are travelling fast, asin the case of direct actingscrew engines, and they arevery often made of large discs or rings of india rubber, evenwhen the engines travel slowly. A very… … Trunk Air Pump. Scale -J- inch to 1 foot. DISC YAXYE5 FOPw AIE PUMPS. 229 Fig. ^^^I§^ CI
Steam engineering · Steam-engines
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