AN EXPERIMENT FOR YOU
While watching the progress of some plants of lotus, Linnaeus, the great Swedish botanist (1707-78). began that series of observations upon whiah his great work “Sleep of Plants,” is based. He found that nocturnal (night) changes were determined by temperature, and the daily alterations of light and darkness; and that movement is not actually caused by darkness, but by the difference in the amount of light the plant receives during the night and day. Many plants, notably the nasturtium, unless brightly illuminated during the day, will not sleep at night. If two plants were placed in the centre of a room, one from the open air, and the other from a dark corner, the neutral light which would cause the former to droop its leaves would act as a stimulant upon the latter. Interested readers should try this experiment for themselves.
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Nelson Evening Mail, Volume 77, 24 October 1942, Page 5
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145AN EXPERIMENT FOR YOU Nelson Evening Mail, Volume 77, 24 October 1942, Page 5
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