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Scientific American, Vol. 69, No. 25 (1893) (1893)
leaf 3
one outer end a crank arm, whereby the drum may WITHOUT THE USE OF WIRES. be rotated to tighten the chains. There are also rat- the following way, as may be understood by an inspec- tion of Figs. 2 and 3. The coin putin at A falls intoa chet wheels on the drum, engaged by pawls on a trans- channel… … ing apparatus, may push the piston before it with the A NEW SYSTEM OF LIGHTING STREET GAS LAMPS least pressure. The quantity of the liquid to be dis- WITHOUT THE USE OF WIRES, © 1893 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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