SUSCEPTIBILITY OF AMPHIBIAN OVA TO X-RAYS 



473 



This table includes Experiments 6 and 11. In Experiment 6, 

 eggs from three batches 'A/ 'B,' and 'C were exposed for about 

 half an hour to the X rays. One set was exposed at room temper- 

 ature, about 66 degrees F. ; two other sets were exposed in water 

 at about 50 degrees F. One of these sets was kept for 18 hours, 

 the other for 42 hours out of doors. The out-of-doors tempera- 



TABLE 5b— Continued 



