Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 512
sel is coated with lamp-black, and is so adjusted that the sunsrays fall perpendicularly upon it. Thiscan be ascertained by observing whenthe shadow exactly covers the lowerdisc which is fitted to the same axis. The instrument was exposed forfive minutes at a time to the sunsrays ; knowing the… … Fig. 453 -488] Terrestrial Heat 495 The solar constant Q is the quantity of heat in gramme-degrees which asquare centimetre of a perfect absorbent would receive in a minute from thevertical suns rays at the limit of the atmosphere. On the surface of theearth the value Q is less, but by determining…
Physics
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