58 The Journal of Heredity 



data do not show any significant de- Doubtless some of these families, par- 

 crease in the marriage rate. ticularly of graduates in the later 

 b. There has not been a statistical- periods, are not complete yet, for the 

 ly significant decline in the birth rate wives' ages are less than 45 years, 

 among the male graduates concerning Table 4 shows fluctuations from 

 whom adequate information was fur- period to period, but no clear evidence 

 nished by the questionnaires. The of a general or progressive decrease in 

 total number of married women, the family sizes. This conclusion is borne 

 sizes of whose families were definitely out by the more refined analysis that 

 determined, was so small that compari- follows. 



sons of the birth rates in their fami- The data for the men are massed in 

 lies have little value.* Table 5 in two fifteen-year periods in- 

 Table 4 shows the average num- stead of six five-year periods. Here 

 her of children per male graduate again only the families are included in 

 and per married male graduate by which the total number of children to 

 five-year periods. The total number of date (deceased as well as living) was 

 children to date was ascertained for furnished, 

 each of the families represented. (To be concluded in June number) 



* The full sizes of 2j women's families were ascertained. The 7 women graduating 

 from 1874-1884 had an average of 2.4 children. The 20 graduating from 1885- 1899 had an 

 average family of 1.9 children. This comiputation does not include 14 women who mar- 

 ried male graduates, and whose children were therefore included in the determination of 

 birth rates in the men's families. 



Literature Cited 



' Castle, W. E. Genetics and Eugenics. Harvard University Press. 1920. 



■ Bell, A. G. The Duration of Life and Conditions Associated with Longevity. 

 Genealogical Record Office, Washington, D. C. 1918. 



" Pearl, R. The Biology of Death. J. B. Lippincott Co. 1922 



^ The reader may refer to Castle's Genetics and Eugenics (previously cited), or to 

 C. B. Davenport's Heredity in Relation to Eugenics (Henry Holt and Co., 191 1) for 

 data on the inheritance of physical variations in man. 



" Psychological Examining in the United States Army, edited bv R. M. Yerkes, National 

 Academy of Sciences, vol. xv, Government Printing Office, Washington, D. C. 1921. 



" GoDDARD, H. H. Feeblemindedness, Its Causes and Consequences. Macmillan, 1914. 



"' Henry Holt and Co. 1906. 



** The Macmillan Co. 1918. 



* PoPENOE AND JoHNSON. Applied Eugctitcs. See also, Popenoe, Paul. The Increase 

 of Ignorance. Journal of Heredity, vol. viii, pp. 178-183. April, 1917. 



" Cattell, J. McKeen. Families of American Men of Science, H. Marriages and 

 Number of Children. Scientific Monthly, vol. iv, pp. 248-262. March, 1917. 



11 Nearing, Scott. Social Decadence. North American Rcvieiv, vol. 197, pp. 629-639. 

 May, 1913. 



■"Holmes, S. J. The Trend of the Race. Harcourt, Bruce, and Co., New York. 1921. 

 All students of Eugenics should read this excellent presentation of the racial aspects of 

 Engenics. 



"Johnson, R. H., and Stutzmann, B. Wellesley's Birth Rate. Journal of Heredity, 

 vol. vi, pp. 250-253. 1915. 



'^ Cited from Journal of Lleredity, vol. vii, pp. ,5(ir)-;j()(). 191(). 



'^Banker, H. J. Coeducation and Eugenics. Journal of Heredity, vol. viii, pp. 

 208-214. 1917. 



'"Hunt, H. R. Matrimonial Views of University Students. Journal of Heredity, vol. 

 xiii, pp. 14-21. Jan., 1922. 



'' Henderson, R. Mortality Lazvs and Statistics, first edition, John Wiley and Sons, 

 New York. 191 5. The table used is on page 107. 



