THE INHERITANCE OF FAMILY TRAITS 45 



The evidence for this has never been fully set forth. It rests on five 

 fraternities in which the ten parents diverged (in pounds) from the nor- 

 mal as follows: 1, 1, -2, -7, -7, -9, -11, -12, -33, -47. Every grand- 

 parent was below normal in weight except one who was just normal. Of 

 23 children only 3 are above normal. Their total excess weight amounts to 

 25 pounds, while the total deficiency of the 20 remainmg children is 

 374 pounds — an average deficiency for the 23 children of 15 pounds. 

 Truly, a slender population. 



If both parents are heavy and of heavy ancestry their 

 childi-en tend, on the whole, to be heavy (Fig. 17). 



QO qonp DO 



>t'"' 



+ j5 o V. c orp. $t oMi 



fiMi 



t48 *5o 



stout 



FiQ. 17. — Pedigree of family with corpulency. Great -grandparents, 

 grandparents and one of the parents are much above normal weight for their 

 stature and the same tendency is found throughout the fraternities to which 

 they belong. The father is slender. His daughter is, at an early age, inchned 

 to stoutness. F. R.; Hal. 3. 



I have data on four families that meet these conditions and give in 

 Table VII all the data concerning their deviations in weight from the nor- 

 mal. 



Table VII 



THE DEVIATIONS FHOM NORMAL STOUTNESS (WEIGHT -f- ST ATURe) OF tAe AN- 

 CESTORS AND CHILDREN WHEN BOTH PARENTS ARE HEAVY 



Reference 



13 18 



C, child; F, father or father's; M, mother or mother's. 



