Mast, Samuel Ottmar, b.1871 · New York, J. Wiley & Sons; [etc., etc.] · leaf 83
umule cast on a white surface temporarily arrangedfor the purpose (Fig. 6). The intensity of light to which the plumules were ex-posed varied from about 2 to 14 ca. m. In most of theexperiments they were exposed to the lowest intensity, theedge of the plumule at the beginning of the… … 9:15 A.M:. 10:00
Light -- Physiological effect · Phototropism
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