Tuberculosis, heredity and environment / by Karl Pearson ... being a lecture delivered at the Galton Laboratory for National Eugenics, March 12, 1912.

  • Karl Pearson
Date:
1912
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Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: Tuberculosis, heredity and environment / by Karl Pearson ... being a lecture delivered at the Galton Laboratory for National Eugenics, March 12, 1912. Source: Wellcome Collection.

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    TUBERCULOSIS, HEREDITY only be legitimate if I were basing percentages on many hundreds—but I use them only to emphasize the nature of the problems which arise, i. e. : [a] We have to inquire whether persons living habi¬ tually in the same environment and with practically the II. m IV, V VI VII ,oJ? зё? »f? * Ч Y3? f J7 V I Г Y39 n ¥11 ■■¥94: —r T- T 1 zé? з0 4Ô 5' léQ iQ 8§ 9Q «9,.,. f/f. 1*2 1^fí ТтГч *5- 9 4f „О fil Л I 1 1 'T г I 1 1 1 г 1 о л? т 1 1 ô ié зё?40 sà .0 7f ef?99 •fj<5 Ч-1 =eis Fig. III. Family Phthisis : Pearson's Case. same risk of infection have the same chance of develop¬ ing phthisis whatever be their stock. There is no closer relation than that of husband and wife. Is the mate of a phthisical person as likely to acquire the disease as the offspring of such a person ? (â) If we find numerous cases of phthisis in a stock,