Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 554
, and into alower plate d, by which the wholeapparatus is fastened down to theplate of the pump ; lastly, h is thelever by which the clapper is agi-tated. After about 10 strokes of the piston, the soundbecomes sensibly more feeble, and if the exhaustion becontinued long enough it will cease… … NATURAL PHILOSOPHY. place a bird inthe receiver of apump andexhaust;
Mechanics · Acoustics · Optics
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