Hartmann, Francis M., 1870- · New York, McGraw-Hill · leaf 309
, to complete the cycle, thewater must again be raised from the level H2 to H\. This isdone at the expense of the radiant heat from the sun, by means ofwhich the water from streams, lakes, the oceans, etc., is evapo-rated and carried, by means of convection currents, to higherelevations, where… … Fig. 61. through a pipe of varying cross-section, is very similar to theflow of a liquid under similar conditions; but, the flow of a gasdiffers materially from that of a non-compressible liquid in tworespects. That is, in general, the weight of the gas, or staticalhead, is negligibly small in…
Heat · Thermodynamics
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