Eugenics: The Science of Human Improvement by Better BreedingH. Holt, 1910 - 35 pages |
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Eugenics: The Science of Human Improvement by Better Breeding Charles Benedict Davenport No preview available - 2019 |
Eugenics: The Science of Human Improvement by Better Breeding Charles Benedict Davenport No preview available - 2016 |
Common terms and phrases
20 millions abnormal conditions absence aden Adolf Meyer albinic strain American Breeders Apop Astig ASTIGMATISM becile belong to strains branes Bright's Disease bron bronchitis brown pig C. B. DAVENPORT C. E. Woodruff characteristics chorea Committee on Eugenics congenital consanguineous marriages cousins defective strain dement determiner that stops dropsy females Figures in circles flaxen germ cells germ plasm hair HEART DISEASE HERMAPHRODITISM highly unfit illustrate the precision imbecile parents incidence of disease independent unit characters inhibitor Insane and Feeble-minded iris pigment KIDNEY lack brown liability MANIAC-DEPRESSIVE mast'd ment method of inheritance MIGRAINE mucous mem MUCOUS MEMBRANES nerv nervous neurotic night blindness normal children offspring organ pedigrees poor climate principle of segregation proto protoplasm records retinitis rheu rheumatism riage School for Feeble science of heredity simplex skin specific diseases STANFORD sub-committees suicide tance of various teristics tion tub'r tuber tuberculosis undesirable defect unfit matings unit defect
Popular passages
Page 20 - ... pedigrees, one is impressed by the fact, first, that the incidence of diseases is not haphazard nor. in any large family, do the various causes of death occur in the proportions given in the census tables for the population as a whole. Tuberculosis of the lungs is the cause of more than 10 per cent, of the deaths in the United States, but it would not be difficult to pick out of my collection ten families comprising about 100 deceased persons among whom, instead of the expected 10, not one died...
Page 15 - Bennett, a defective father and imbecile mother have 7 children all more or less mentally and morally defective. There is, so far as I am aware, no case on record where two imbecile parents have produced a normal child. So definite and certain is the result of the marriage of two imbeciles, and so disastrous is reproduction by an imbecile under any conditions, that it is a disgrace of the first magnitude that thousands of children are annually born in this country of imbecile parents to replace and...
Page 8 - There is thus a segregation of presence and of absence of the determiner in the germ cells of the mixed offspring. The characteristic in the offspring that is due to a single (instead of the normal double) determiner is called a simplex characteristic. Such a characteristic is frequently distinguishable from one that is due to the double determiner by its imperfect development. Thus the offspring of a pure black-eyed and a blue-eyed parent will have brown eyes. It is a corollary of the foregoing...
Page 7 - These determiners are transmitted in the germ plasm and are the only things that are truly inherited. It is a corollary of the theory of inheritance from the determiner that we do not inherit from our parents, grandparents or collaterals, but related individuals have some common characteristics because developed out of the same germ-plasm with the same determiners. A child resembles his father because he and his father are developed from the same stuff. Both are chips from the same old block. In...
Page 23 - ... are expectation. The excess of the non-subject may be explained on the same ground as the exceptions to complete incidence of disease referred to in the preceding paragraph. If both parents belong to strains having the same unit defect even though they have it not themselves, we may expect either that one-quarter or none of the children will have the defect, depending on earlier ancestry. This rule is illustrated by some of my cases (D, I ; D, 3).
Page 16 - ... question. If this proves to be impracticable, then sterilization is necessary — where the life of the state is threatened extreme measures may and must be taken. Maniac-depressive insanity seems likewise due to a defect, in any case it is especially apt to occur in families in which both parental strains show the disease. I give a few cases. (A 2, 3.) While, on account of the complexity of nervous diseases, all of the children even of two neurotic parents are not always neurotic, the chances...
Page 8 - ... foregoing that if the individual with a simplex character be mated to one lacking the character half of the offspring will lack the determiner and half will be simplex, again, in respect to the character. If in both parents the character be simplex, then two like determiners will meet in one-fourth of the unions of egg and sperm, the two will both be absent in one-fourth of the unions, and one only will occur in half of the unions — such will be simplex again. If one parent have the characteristic...
Page 32 - But we have become so used to crime, disease and degeneracy that we take them as necessary evils. That they were, in the world's ignorance, is granted. That they must remain so is denied.
Page 16 - The country owes it to itself as a matter of self-preservation that every imbecile of reproductive age should be held in such restraint that reproduction is out of the question. If this proves to be impracticable then sterilization is necessary — where the life of the state is threatened extreme measures may and must be taken.
Page 31 - We shall also learn whence come our 300,000 insane and feeble-minded, our 160,000 blind or deaf, the 2,000,000 that are annually cared for by our hospitals and homes, our 80,000 prisoners and the thousands of criminals that are not in prison, and our 100,000 paupers in almshouses and out. This 3 or 4 per cent of our population is a fearful drag on our civilization. Shall we as an intelligent people, proud of our control of nature in other respects, do nothing but vote more taxes or be satisfied with...