Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 280
ons of equaltemperature; an arrow ateach station, indicatingthe direction of the wind;and small circles markedto show whether it isclear, partly cloudy, cloudy,rain, or snow, respectively.The cloudy areas areshaded, the low pressureareas are marked LOW,and the high pressure areasare marked HIGH.… … 270 MECHANICS OF FLUIDS The piston (P) works air-tight in the cylinder of thepump. When the piston is drawn up, the valve (B) closes,and a partial vacuum is left behind the piston. The air-pressure, acting on the surface of the water (C, C) in thewell, forces the water up to fill this partial…
Physics
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