special interest old bicycle pump was soldered up tight at the bottom. in trials made with an empty automobile the vehicle between 1 and 0.1 millimeter. The average pump just An inch up, a half-inch hole was drilled, and the slant- has fallen three times. Yet this young woman has ing tube, R,… … Pictured in the accompanying engraving is an im- women to risk their lives nightly before crowds of AN EXPERIMENTAL AIR PUMP, proved valve for oil wells which provides a tight joint spectators? Is it ambition, vanity, love of applause, at the stem of the drill and permits control of the or simply…
Internet Archive · Public domain (published before 1931). Free to use for anything.
