PLATE 1 



EXPLANATION OF FIGURES 



Figs. 1, 2, 3, 4 Photographs of a bird with cerebrum and thalamus removed 1 

 at different body temperatures. Photographs made at two-hour intervals. Body 

 temperature lowered and raised by putting the bird in a cooled.or warmincubator. 



1 Body temperature 33°. 



2 Body temperature 26°. 



3 Body temperature 22°. 



4 Body temperature 39°. 



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