Stewart, Balfour, 1828-1887 · Toronto : James Campbell · leaf 53
lower valve in order to fill upthe empty space made by raisingup the piston. \\Tien we lower thepiston again, just as in the air-pump, the lower valve will be shut,and the valve in the piston willopen and let out some air. Infact, we are now pumping out theair from the barrel and the tube.But… … outer air is no longer counter- Y^z. i3. balanced by that of the air in thetube; the outer air ^^ill therefore find itself unopposed,and will drive up the water into the tube, until at last,when all the air is taken away, the whole tube ^^411be filled with water. This water will then enter thepump…
Physics
Internet Archive · Western University Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher05nati-141-88.webp)
