. Practical physics. Fu 43. The liftpump PNEUMATIC APPLIANCES 43. Fig. 44. The force pump ^ 54. The force pump. Fig. 4-i illustrates the construction ofthe force pump, a device commonly used when it is desiredto deliver water at a point higher than the position at whichit is convenient to place the pumpitself. Let the student analyze theaction of the pump from a study ofthe diagram. In order to make the flow of waterin the pipe IfS continue during theupstroke, an air chamber is alwaysinserted between the valve a and thedischarge point. As the Avater isforced violently into this chamber bythe d
. Practical physics. Fu 43. The liftpump PNEUMATIC APPLIANCES 43. Fig. 44. The force pump ^ 54. The force pump. Fig. 4-i illustrates the construction ofthe force pump, a device commonly used when it is desiredto deliver water at a point higher than the position at whichit is convenient to place the pumpitself. Let the student analyze theaction of the pump from a study ofthe diagram. In order to make the flow of waterin the pipe IfS continue during theupstroke, an air chamber is alwaysinserted between the valve a and thedischarge point. As the Avater isforced violently into this chamber bythe downward motion of the pistonit compresses the confined air. It is,then, the reaction of this compressedair which is immediately responsible for the flow in the dis-charge tube; and as this reaction is continuous, the flow isalso continuous. 55. The Cartesian diver. Descartes(1596-1650), the great French philoso-pher, invented an odd device which illus-trates at the same time the principle ofthe transmission of pressure by liquids,the principle of Archimedes, an
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectphysics, bookyear1922
