PHOTOSYNTHESIS IN VARIOUS PORTIONS OF THE SPECTRUM

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Abstract
A description of a method of studying photosynthesis and preliminary results. Infra-red radiation longer than 1100 m[mu] is detrimental to photosynthesis. With spruce the relative quantum yields in the wave lengths 720-630, 720-560, and 470-390 m[mu] are 9.5, 10 and 5; and with white pine, 9.5, 11, and 5. The actual quantum yield with pine is between 5 and 12 quanta per molecule of CO2.

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