Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 478
. Theface of the vessel is coated with lamp-black, and is so adjusted that thesuns rays fall perpendicularly upon it.This can be ascertained by observingwhen the shadow exactly covers thelower disc which is fitted to the sameaxis. The instrument was exposed forfive minutes at a time to the sunsrays… … -481] Terrestrial Heat. 461 Pouillet calculated from the results of experiments with this apparatusthat if the total quantity of heat which the earth receives from the sun in thecourse of a year were employed to melt ice, it would be capable of melting alayer of ice all round the earth of 35 yards…
Physics
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