f the airin the receiver, B. Taking full strokes with the pump, noticethe relative amount B falls at the end of each stroke. If Bfalls one-fifth of its first reading, one-fifth of the air has beenremoved. Try a small receiver at R, or, if necessary, discon-nect R a,t D and let the pump exhaust the… … Fig, 41. stroke. At the next stroke, one-half of the remaining air, Orone-fourth of the original amount, is removed. Air-pumps of immense size are used to remove the air fromthe condenser of condensing steam engines, such as are usednow on all large steamers. The vacuum gauge on one of theseengines…
Physics
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