472 



CHAKLES RUSSELL BARDEEN 



EFFECT OF TEMPERATURE 



Several experiments were made to test the effect of tempera- 

 ture on the action of the X rays. Since at a not too high temper- 

 ature the eggs divide more rapidly than at a low temperature, 

 and in consequence in such eggs the anabolism of nuclear material 

 is more rapid, we should expect the former to be more suscep- 

 tible than the latter. That this is the case is clearly indicated by 

 the following table : 



TABLE 5b. 

 Effects of variations in temperature on eggs daring the early cleavage stages 



