68 FAMILY STUDIES IN BUILD. 



The one daughter for whom data are given has had numerous children's 

 diseases. Her general health is now good. At 18 years of age she has the 

 formula 114/64 inches; build 2.0 (28). 



Comment.— Parents and child are all slender (A : 011d-19). 



A : 01-44 Family. 



A family of English extraction. The Father, a dentist, has good general 

 health, but habitual constipation. At 20 years of age he had the formula 

 140/68 inches; build 2.1 (30). 



The Mother has occasional headaches. At the age of 18 her formula was 

 104/62 inches; build 1.9 (27). 



The son has general good health, but is inclined to kidney trouble, skin 

 diseases, and headache, presumably from his eyes. At 18 he has the 

 formula 124/66; build 2.0 (29) A : 011d-19). 



A : 01-60 Family. 



A family of English extraction with some Irish and Scotch blood in 

 addition. 



The Father, a minister, has had pneumonia and dyspepsia, but his general 

 health is good. At 22 years he had the formula 132.5/68 inches; build 

 2.0 (29). 



The Mother has had piles and slight attacks of rheumatism. Her general 

 health is very good. At 19 years she had the formula 110/64 inches; 

 build 1.9 (27). The one child for whom data are available is: 



1. Female, inclined to rheumatism and kidney trouble, like her Mother. 

 She has had practically all children's diseases, and at 19 her formula is 

 108/65 inches; build 1.8 (26). 



Comment. — Both parents and their child are slender (A : 011d-60). 



A : 01-63 Family. 



A family of English extraction. The Father, a teacher, is in good health. 

 At 45 his formula is 134/69 inches; build 2.0 (28). 



The Mother's health is generally good. She is inclined to some skin 

 trouble and is troubled with headache and habitual constipation. At 34 

 years she had the formula 97/59 inches; build 2.0 (28). 



The one child is a son in general good health, although he has rheuma- 

 tism and constipation. He is also subject to frequent colds and grippe. 

 At 19 years of age he has the formula 111/68 inches; build 1.7 (24). 



Comment. — Both parents and the child are of slender build (A : 011d-63). 



Summary of S X S Matings. 

 The gametic constitution of slender parents is certainly very 

 diverse. Assuming that both slender parents produce only gametes 

 of the type Abe, their offspring would be exclusively of the type 

 AAbbcc, which we may take as a zygotic formula for slender progeny. 

 Assume that in another case both slender parents have the zygotic 

 formula AaBbcc; then they would each produce gametes ABc, Abe, 

 aBc, and abc. Uniting at random, these gametes would produce 

 zygotes as follows: 



Number of dominant factors. . . 4 3 2 10 



Proportions 6.25 25 37.5 25 6.25 



