Mast, Samuel Ottmar, 1871- · New York : J. Wiley & Sons · leaf 165
ived to be due to an increase in the backward phase of the stroke * Mut, 1907, pp. iji-154* ORIENTATION IN COLONIAL FORMS 139 on the shaded side, or a decrease in the same phase on theilluminated side or a decrease in the forward phase on theshaded side, or an increase in this phase on the… … Fio. 19. Graphic representation of the total average difference in deflectiondue to difference in light intensity on opposite sides of Volvox colonies, compiledfrom numerous experimental records, a, plate-glass aquarium 8 cm. wide and15 cm. long; h, light rays; c, c, points where the colonies were…
Light · Phototropism
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