Stewart, Balfour, 1828-1887 · Toronto : James Campbell · leaf 57
on to the barrel, because otherwise the air willget in from above and prevent the action. Sometimes, 46 SCIENCE PRIMERS. [moving however, if a pump is not much used, the leather orother packing around the piston gets dry, and thepump will not act. In that case, if a little water isthrown upon the… … r / Fig. 19. pressure of the air. I shall not, however, explain itsprinciple. You see the syphon before you in thefigure ; it is used for conveying liquids from a vesselat a higher to one at a lower level. In the first place,you must invert the syphon tube, and completely fillit with water, keeping…
Physics
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