Worst, Edward F. (Edward Francis), 1866-1949, Barber, Harriette, [from old catalog] joint author, Seymour, Marian, [from old catalog] joint author · Chicago, A. W. Mumford and company · leaf 263
ve the piston. Waxed thread is wound tightlyaround the rod, just above and below the piston to preventits slipping. A No. 6, rubber stopper g, is put in the topof the chimney, and a bent glass tube passes through one ofthe holes to serve as a spout, while the rod which movesthe piston passes… … FIGURE XXIII.260 To make a force pump a, the plug is Femoved from thelower stopper of the lifting pump and thrust into the open-ing b, of the piston I, under the valve. An air chamber c,is made from a one-ounce wide mouthed bottle as shown indrawing. Through one hole of its stopper a bent glass…
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