. The power of movement in plants . Plants; Botany. Chap. VILL HELIOTEOPISM. 429 After having seen how the epicotyls moTed towards a mode lately bright light, seedlings were placed at (Sept. 7th) before a north-east window, covered by a towel, and shortly afterwards by an ordinary linen blind, but the epicotyls still moved towards the window. At two additional muslin blinds were suspended, so that the seedlings received very little more light from the window than from the interior of the room. The sky varied in brightness, and the seedlings occasionally Fig. 175. <?**« i
. The power of movement in plants . Plants; Botany. Chap. VILL HELIOTEOPISM. 429 After having seen how the epicotyls moTed towards a mode lately bright light, seedlings were placed at (Sept. 7th) before a north-east window, covered by a towel, and shortly afterwards by an ordinary linen blind, but the epicotyls still moved towards the window. At two additional muslin blinds were suspended, so that the seedlings received very little more light from the window than from the interior of the room. The sky varied in brightness, and the seedlings occasionally Fig. 175. <?**« iO'40' Mao' ns' Tropaiolum majus: heliotropic moTemcnt and of theepicotyl of a young seedling towards a dull lateral li^ht, traced on a horizontal glass from to Figure reduced to one-half of the original scale. received for a short time less light from the window than from the opposite side (as ascertained by the shadow cast), and then one of the blinds was temporarily removed. In the evening the blinds were taken away, one by one. The course pursued by an epicotyl under these circumstances is shown in Kg. 175. During the whole day, until , it plainly bowed itself towards the light; and the tip moved over a considerable space. After it moved backwards, or from the window, till. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925. New York : D. Appleton
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Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
