WATER RELATIONS OP PROG 



111 



Hours 



Fig. 64. Course of water load (% of Bq) in each of two frogs that were injected 

 intraperitoneally (at the arrows) with distilled water. The cloacas were ligated at the 

 time of injections and later opened (at the crosses) ; the first being ligated twice. 

 The differences of body weight before and after the crosses measure the urine excreted 

 since ligating. Redrawn from Adolph ('39b). 



■*^o 



I 



-10 



Hours 

 Fig. 65. Course of water load ( % of Bq) after recovery commenced. Eana pipiens. 

 Points and solid lines, total water load ; light dash Unes, gross load, which includes urine 

 kept in the body by ligature on the cloaca. The difference between solid and dash line 

 represents total output since zero time. Each line is the mean of 10 individuals grouped 

 in order of the initial loads imposed. Further data of Adolph ('39b). 



