August Weismann

This claim had already been made explicitly by August Weismann at the end of the nineteenth century, who differentiated between the germplasm of an organism, the tissue that forms the gametes to produce the next generation, and the somatoplasm, the tissues of the rest of the body.

The Genotype/Phenotype Distinction Lewontin, Richard 2004

It was left to a German biologist, August Weismann, working during this same period, to put an end to the long scientific vitality of the pangenetical hypothesis.

Dictionary of the History of Ideas PETER VORZIMMER 1968

But just as the tide of opinion was turning strongly in this direction, an utterly unexpected obstacle appeared in the form of the theory of Professor August Weismann, put forward in 1883, which antagonized the Lamarckian conception (though not touching the Darwinian, of which Weismann is a firm upholder) by denying that individual variations, however acquired by the mature organism, are transmissible.

A History of Science: in Five Volumes. Volume IV: Modern Development of the Chemical and Biological Sciences 1904

Professor August Weismann has put forth a new theory of heredity founded upon the "continuity of the germ-plasm," one of the logical consequences of which is, that acquired characters of whatever kind are not transmitted from parent to offspring.

Darwinism (1889) Alfred Russel Wallace 1868

The apologist spokesman August Weismann, who claims senescence is essential to the evolution of higher spe - cies, influenced the psychoanalytic concept of a “death instinct” (see Freud, Beyond the Pleasure Principle, Sec.

LONGEVITY GERALD J. GRUMAN 1968