18 



build: definition and ontogeny. 



pounds 



210 



pourds 



m 



130 

 180 

 170 

 160 

 150 

 140 



623 



130 

 120 



B23 



l0 °25 30 35 40 45 50 55 60 



Fig. 3. — Changes in weight from 25 

 to 50 or 60 years of father (F), 

 mother (M), and son (S) in D: 

 Bol-1 family, showing a consist- 

 ent history of rapid increase of 

 build with age. 



20 25 30 35 40 45 50 55 



60 65 70 75 



yVs 



Fig. 4. — Changes in weight from 25 (or 40) years to 

 45 (or 75) years of father (F), mother (M), and 

 daughter (D) in D: Boi/-la family, showing a 

 history of fluctuating build. 



pound 



200 



190 

 150 

 170 

 160 

 150 

 140 

 120 

 130 

 110 

 100 



20 



25 30 



35 



40 45 



50 

 yYs 



Fig. 5. — Changes in weight from 25 to 

 45 years of 3 sibs belonging to the 

 D: Hay-1 family, showing a slight 

 tendency to increase with age. 



pounds 



170 



160 

 150 

 140 

 130 

 120 

 110 

 100 



15 



20 25 



30 



35 40 45 50 



yrs 



Fig. 6. — Changes in weight from 15 to 50 years 

 in 4 sibs of the D: Ban-1 family, showing 

 no great tendency to change of build dur- 

 ing life. 



