Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 588
es connecting the upper and under chambers; bolted fast toupper chambers, but connected to the under chambers by expansionjoints. o, the steam-valves, and p, the exhaust-valves, fixed in pairs on thespindles, and denominated equilibrium or balance valves. q r, the valve-spindles, having their under… … 1512, 1514.
Mechanical engineering
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