The physiology of photosynthesis / by Sir Jagadis Chunder Bose.

  • Jagadish Chandra Bose
Date:
1924
Catalogue details

Licence: In copyright

Credit: The physiology of photosynthesis / by Sir Jagadis Chunder Bose. Source: Wellcome Collection.

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    PAGE Cessation of photosynthesis on stoppage of light—Molecular strain under photic stress—Partial undoing of positive work on cessation of light—Induction-period and its prolongation under increasing periods of previous darkness—The cyclic curve—Effect of physiological inertia ........ 83 CHAPTER XII EFFECT OF INTERMITTENT LIGHT ON PHOTOSYNTHESIS Further evidence of the intervention of the molecular factor—Effect of intermission on photosynthetic activity under sky light and under Pointolite—Diminution of photosynthetic activity under moderate frequency of intermission—Increased activity under higher frequency—The curve of variation of activity under intermittent light ......... 90 CHAPTER XIII THE AUTOMATIC RADIOGRAPH The Selenium Cell—Elimination of effect of polarisation—The Wheat- stone Bridge for balance—The automatic keys for periodic closures of circuit—The Galvanograph—Automatic record of hourly variation of daylight—Record on a cloudy day—Simul- taneous records of variation of daylight and temperature— Light-noon and thermal noon ...... 98 CHAPTER XIV THE ELECTRIC PHOTOMETER The Portable Electric Photometer—Calibration of the Photo- meter-Measurement of widely varying intensities of light—Best aspect of sky for uniform light—Variation of light from northern sky in the course of the day—-Sunlight and artificial light . . 108 CHAPTER XV RELATION BETWEEN C02-SUPPLY AND PHOTOSYNTHESIS Depression of general physiological activity under C02—Narcotic and poisonous action of excess of C02 on photosynthesis—Photo-
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