PHYSICS. 6d (juito understand tliat the piston of the pump must fitlightly onto tlie liarrel, because otherwise the air willget in from above and prevent the action. Sometimes,however, if a pump is not much used, the leather orother packing around the piston gets dry, and thepump will not act. In… … wliich the action depends, like the pump, upon thepressure of the air. I shall not, however, explain itsprinciple. You see the syphon before you in the QQ SCIENCE PKIMKRS. [moving figure; it i.s used foi conveying liquids irom a xcsselat a higher to one at a lower kvcl. In the tirst place,you must…
Physics
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