308 



ROBERT A. BUDINGTON AND HELEN F. HARVEY. 



Results from Use of Mammalian Thyroid. 



For convenience in seeing at a glance the relation which held 

 between the experimental lines and the controls during the use 

 of any particular kind of thyroid, the data for the three experi- 

 ments with each thyroid have been averaged, the controls for 

 the same averaged, and the results placed in curve form.^ These 

 follow : 



Ctf 'o 



CO 4J 



3 ^ 



> 11 



■3 S3 



M fl 





SjBnpiAipUJ 



>> OS 



1 An erroneous conclusion is rather easily drawn from these charts, for at first 

 glance it appears that the potential of the gland increases by steady gradation from 

 the fish up to the mammal. When figured as percentage increases of the experi- 

 mental over the control lines, it is found that such is not the case. Data pertaining 

 to this relation are now being collected. 



