. Fundamentals of botany. Botany. EXPERIMENTAL EVOLUTION 529 When discontinuous variation proceeds along a definite line through several successive generations, each step being an intensification of the preceding one, it is designated " orthogenetic saltation" (Fig. 395). 451. Illustration of the Pendtilum.—The difference be- tween discontinuous and fluctuating variation may be. Mean Fig. 396.^—Diagram to illustrate the difference between fluctuating variation and mutation; 0, original point of suspension; M, new point of *' suspension after the mutation has occurred. aptly illustrat
. Fundamentals of botany. Botany. EXPERIMENTAL EVOLUTION 529 When discontinuous variation proceeds along a definite line through several successive generations, each step being an intensification of the preceding one, it is designated " orthogenetic saltation" (Fig. 395). 451. Illustration of the Pendtilum.—The difference be- tween discontinuous and fluctuating variation may be. Mean Fig. 396.^—Diagram to illustrate the difference between fluctuating variation and mutation; 0, original point of suspension; M, new point of *' suspension after the mutation has occurred. aptly illustrated by a swinging pendulum (Fig. 396). The vertical position, assumed when at rest, is the mean of all positions that may be assumed as the pendulum swings; 34. 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 Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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