362 



ADAPTATION 



TABLE LXVIII. 



RELATION BETWEEN TEMPERATURE AND RATE OF HEART 

 BEAT IN FUNDULUS EMBRYO. 



(c) The time necessary to reach sexual maturity is decreased 

 by increase of temperature. Stefansson reports that the Eskimo 

 girl usually has offspring by her twelfth year. This early maturity, 

 he states, may be attributed to the fact that the Eskimo keeps his 

 body at a temperature as high if not higher than that of dwellers 

 in Southern Europe. Be that as it may, other observers have 

 noticed that growth in height and in weight is increased during 

 periods of increased temperature, e.g. summer (see Growth). 



