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Scientific American, Vol. 70, No. 3 (1894) (1894)
leaf 8
at; and that no obstruction is caused. Figs. 2 to7 unnecessary expense. show the appavratus in detail. Referring to Fig. 7, Eis On some lines pits are dug in the six-foot way, and SECTION OF AIR CYLINDER the rail, and close alongside it is placed an inclined the men are stationed in them and… … © 1894 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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