Ill] OF GROWTH IN INFANCY 117 



relatively to their parents' size. But another rule comes in, which 

 is perhaps less to be expected, that the offspring are born smaller 

 the larger the species to which they belong. Here we shew, roughly, 

 the relative weights of the new-born animal and its mother*: 



These differences at birth are for the most part made up quickly; 

 in other words, there are great differences in the rate of growth 

 during early post-natal life. Two Uourcubs, studied by M. Anthony, 

 grew as follows: 



Male Female 



Thus the lion-cub doubles its weight in the first month, and 

 wellnigh doubles it again in the second; but the newborn child 

 takes fully five months to double its weight, and nearly two years 

 to do so again. 



The size finally attained is a resultant of the rate and of the 

 duration of growth; and one or other of these may be the more 

 important, in this case or in that. It is on the whole true, as Minot 

 said, that the rabbit is bigger than the guinea-pig because he grows 

 faster, but man is bigger than the rabbit because he goes on growing 

 for a longer time. 



A bantam and a barn-door fowl differ in their rate of growth, 

 which in either case is definite and specific. Bantams have been 

 bred to match almost every variety of fowl ; and large size or small, 

 quick growth or slow, is inherited or transmitted as a Mendehan 



* Data from Variot, after Anthony, 



