jo Appendix I 



ments took some five or six years to com- 

 plete, and the results are set forth in a 

 memoir published in 1903. They involve 

 no physiological theory of heredity ; they 

 merely describe statistically the observed 

 quantitative resemblance between parents 

 and offspring, and, again, between members 

 of the same stock. The work was an 

 obvious, if necessary, continuation of Mr. 

 Francis Galton's researches. 



'II. Are the mental and physical char- 

 acters inherited to the same extent ? The 

 answer to this question is given in the 

 Huxley Lecture of November, 1903 ; and it 

 is based on observations made on between 

 5,000 and 6,000 school-children. It is there 

 shown that the degree of resemblance of 

 members of the same stock for eight mental 

 and moral characters and for eight physical 

 characters in the case of pairs of brothers, 

 pairs of sisters, and pairs of sisters and 

 brothers is, within the errors of such an 

 investigation, sensibly identical. For the 

 first time we appear to have a quantitatively 

 sound basis for asserting that there is no dis- 

 tinction in the degree of inheritance between 

 the physical and the psychical. If this result 

 be true and so far I have seen no statistical 

 data, only more or less dogmatic opinions, 

 quoted against it it must follow that the 

 physically and mentally fitter stocks produce 

 physically and mentally fitter offspring. Sir 

 J. Crichton-Browne says : " Many of our 



