Integration of Sunlight in the Tropics

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A PHOTO-ELECTROLYTIC method of integrating sunlight has been described by Atkins and Poole (Proc. Roy. Dub. Soc., vol. 19, p. 159). The electric current in a photo-electric cell is proportional to the light falling on it, and the latter can be integrated over any period of time, by measuring electrolytically the total quantity of electricity that passes through a sensitive voltameter in series with the cell. In Dublin, where this method of sunlight integration has been carried out, the average illumination for a bright sunny day in November was estimated as 10,000 metre candles for ten hours.

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