152 



R. J. Harrison and J. L. D'Silva 



there was no significant difference in their activity. Different 

 slices (about 0-5 g.) of the placentome gave results similar to 

 those obtained from a whole placentome removed from the 

 same animal. The activity of the placentome was 0-0058 per 



Table II 



The Activity of Tissues in the Pregnant Goat 15 Minutes 

 after Intravenous Injection of 42 KCI 



1 Activity determined as shown in footnote to Table I. 



2 Potassium content expressed as mg. of K per g. of wet tissue. 



cent at the 35th day and 0-0083 per cent of the total injected 

 radioactivity at the 142nd day of pregnancy. The average 

 activity of the placentome throughout pregnancy was 0-0099 

 per cent ; the lowest figure being • 0023 per cent on the 92nd 

 day and the highest 0-032 per cent on the 91st day. The 



