298 Dr. E,. McCarrison. Effects of Fat Excess on the 



mixture, were observed in contrast with controls receiving the same amount 

 of iodine ia the basal diet but without fats (tigs. 2, 3, 4). 



GRAMS 

 20 



Days of Experiment 



8 15 23 31 



37 



44 



53 



1 1 1 i 



BUTTER 



1 



1 



1 



1-5 





















1-0 











0-5 















111 







1 



¥iG. 2. — Showing the effects of 0-5 mgrm., and of 1"0 mgrm. of iodine in counteracting the 

 retardation of growth induced in tadpoles by an excess of hutter in their food. Dotted 

 line shows the normal rate of growth of tadpoles receiving 1 mgrm. of iodine per gramme 

 of basal diet, but vnthout hutter. 



GRAMS 

 2-0 



Days of Experiment 



8 15 23 



31 



37 



44 





53 





1 1 1 



OLEIC 



1 



ACID 



1 



1 







1-3 















1-0 

 0-5 















Q 



1 1 ! 





1 



1 





1 



Fig. 3. — Showing effects of 0-5 mgrm. and of 1 mgrm. of iodine in counteracting the retarda- - 

 tion of growth induced in tadpoles by an excess of oleic acid in their food. Dotted line 

 shows the normal rate of growth of tadpoles receiving 1 mgrm. of iodine per gramme of 

 basal diet, but without oleic acid. 



