THE EVOLUTION OF DEATH 



6 7 



developed as guinea-pigs, and much less far developed are 

 newborn rabbits. I have determined the rate of growth in 

 both of these animals, and found that chickens, as soon as 



3> 2 13 U 33 <t6566677 90 106 130 197 days 3^2 



FIG. 29. Curve of the daily percentage increase in weight in male chickens. 



y/i 13 22 33 465666 77 90 106 130 197 days 3 



FIG. 30. Curve of the daily percentage increase in weight of female chickens. 



they have recovered from their hatching, may grow as much as 

 9 per cent, per day, which is much quicker than the guinea- 

 pigs grow. The values for the two sexes are practically equal, 



