The main currents of zoölogy . FIG. 32.—AUGUST WEISMAXX(1834-1914) FIG. 33.—HUGO DE VREES THEORIES OF EVOLUTION 157 In 1893 there was published an English translationof his famous book The Germ-Plasm which stimulatedso much discussion among biologists. This setsforth his theory of heredity. For many years Weis-mann was a professor in the University of Freiburg,and his lectures on the evolution theory were de-servedly famous and well attended. The bestexposition in English of his theory is The EvolutionTheory, published in two volumes in 1904. In thepreface he says: I make this attempt to sum u
The main currents of zoölogy . FIG. 32.—AUGUST WEISMAXX(1834-1914) FIG. 33.—HUGO DE VREES THEORIES OF EVOLUTION 157 In 1893 there was published an English translationof his famous book The Germ-Plasm which stimulatedso much discussion among biologists. This setsforth his theory of heredity. For many years Weis-mann was a professor in the University of Freiburg,and his lectures on the evolution theory were de-servedly famous and well attended. The bestexposition in English of his theory is The EvolutionTheory, published in two volumes in 1904. In thepreface he says: I make this attempt to sum up andpresent as a harmonious whole the theories which forforty years I have been gradually building up on thebasis of the legacy of the great workers of the past,and on the results of my own investigations andthose of my fellow-workers. Since we may assume that there has been unbrokencontinuity of the germ-plasm from the beginning, wemay also assume that its organization has becomevery complex. Protoplasm is impressionable
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