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Updated: June 15, 2025
As for Galton's paper, I have never yet been able to fully digest it: as far as I have, it has not cleared my ideas, and has only aided in bringing more prominently forward the large proportion of the latent characters. Down, Beckenham, Kent. October 20, 1872. W. Marshall, Zoological Assistant to Schlegel at Leyden.
What practical application is made of this law in producing better seed and better breeds? Illustrate Galton's law. What significance has these laws in the improvement of the human race? Account for the variability of children in the same family. Why are some children inferior, some superior to their parents? Illustrate the "pull of ancestors."
These inherent factors explain, too, why children born and bred in virtually the same environment show the most extreme differences in educability. That the differences are inherited was made evident by Galton's finding that the chance of the son of an eminent man exhibiting eminent ability was 500 times as great as that of the son of a man taken at random.
But owing to the fact that some inheritable traits or characters are likely to be dominant and others recessive, Galton's law must be modified, so that only under the most favorable conditions can it be regarded as reliable.
There will be little doubt he will answer "Health." After that probably he may say "Beauty." In addition the reader of Mr. Galton's Hereditary Genius will probably say, "ability," "capacity," "genius," and "energy." The reader of Doctor Nordau will add "sanity." And the reader of Mr. Archdall Reid will round up the list with "immunity" from dipsomania and all contagious diseases.
Galton's researches, though not nearly so common as dreams, are as much facts of sane mental experience. Now every ghost or wraith is a hallucination. You see your wife in the dining-room when she really is in the drawing- room; you see your late great-great-grandfather anywhere. Neither person is really present.
British Medical Journal, April 14, 1906. In California and some other States, it appears that deceit regarding health is a ground for the annulment of marriage. Sir F. Galton, Inquiries Into Human Faculty, Everyman's Library edition, pp. 211 et seq.; cf. Galton's collected Essays in Eugenics, recently published by the Eugenics Education Society.
Ah, well, there's a vast deal of truth, no doubt, in these new hereditary doctrines of Darwin's and Galton's that Herbert and Ernest talk about so much; a family's a family, that's certain, not a mere stray collection of casual acquaintances. How the likeness runs through the very inmost structure of our hearts and natures!
According to Galton's celebrated law of ancestral inheritance, the qualities of any organism are determined to the extent of a certain fraction by its two parents taken together as a "mid-parent," that a smaller definite fraction is contributed by the grandparents taken together as a mid-grandparent, and so on to earlier generations.
The gemmules as in Galton's theory of heredity and with neuter insects might be perfectly independent of pangenesis and the normal inheritance of acquired characters.
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