60 



The Journal of Heredity 



Table 4. Children per married graduate and per graduate. 

 Half Decade 1870-1874 1875-1879 1880-1884 1885-1889 1890-1894 1895-1899 



Children per marriedl 

 graduate, where the 

 total number of chil- r 

 dren in the family is I 

 known. J 



Children per graduate. 

 (This computation is 

 based only on single 

 graduates, and grad- 

 uates in whose fami- 

 lies the total number 

 of children is known.) 



2.4 



2.8 



2.4 



3-3 



2.9 



2.8 



2.4 



2.3 



30 



2.5 



Table 5. Children per married male graduate, and per male graduate (married and single.) 



Period 1870-1884 1885-1899 



Children per married male graduate where the total num- 80 families 174 families 



ber of children in the family is known 2.93 1 .17 2.641.10 



Children per male graduate. Includes all single alumni 

 reported, and all married alumni in whose families the 90 individuals 200 individuals 

 total number of children to date is known 2.60 1. 16 2.301.10 



Table 6. Revised table of number of children per >nalc graduate.* 



Period 1870-1884 1885-1899 



64 families 

 Average number of children per married male graduate.. 2.95 1 .18 



112 families 

 2.71 1 .13 



Average number of children per male graduate. 



70 individuals 126 individuals 

 2.70 1 .18 2.41 1 .12 



* A final checking of the original data revealed a few comiparatively unimportant 

 omissions in the preliminary report which appeared in the program of the American 

 Society of Zoologists (1922). The inclusion of several families of dead alumni lowered 

 the average sizes of completed families to those shown in Table 6. These families, 

 together with the additional inclusion of a few second wives of men graduates, are 

 responsible for the changes from the abstract in the sizes of the parental groups and the 

 number of children produced by these groups. (See Tables 8 and 10.) 



A Textbook of Gardening 



Gardening, by A. B. Stout, Director 

 of Laboratories, New York Botanical 

 Garden. World Book Co., New 

 York, 1922. 



An elementary textbook on vegetable 

 gardening for use in the grades. This 

 book includes a chapter covering plant 

 breeding and garden seeds. In sim- 



ple language, is given a discussion of 

 the development of new varieties of 

 horticultural plants using as illustra- 

 tions corn, tomatoes and the pumpkin. 

 The material included has been care- 

 fully selected and effectively presented. 

 It should be welcomed by teachers who 

 wish to give children an appreciation 

 of this side of plant life. — G. M. D. 



