Mast, Samuel Ottmar, b.1871 · New York, J. Wiley & Sons; [etc., etc.] · leaf 281
es observed, as stated elsewhere, that the colonies collect in greatnumbers in the open spaces between pond-lily leaves and other water plantson dark, cloudy days, but that they collect in shaded places when the sunis bright. 268 LIGHT AND THE BEHAVIOR OF ORGANISMS reversed. This is clearly shown… … a 9 FIG. 33. The lines A and B represent the courses taken by single Volvox colo-nies as seen in water 2 cm. deep in a plate-glass aquarium e. (The paths are rep-resented in approximately accurate proportions); g, a group of three 222-voltNernst glowers in a vertical position; a, carbon arc; /,…
Light -- Physiological effect · Phototropism
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