AND ANIMAL LIFE. 59 



Temperature of the pigeon lllf Neither inflated with 

 warm nor with cold air. 



Time Minutes. Thermo, in the Rectum. 



10 - 109^ 



15 - 106$ 



20 - 104| 



25 - 103 



30 - 101 



35 - 100 



40 - 98 



45 - 97i 



50 - 95^ 



55 -..-' 94 



60 - 93 



L. From the results of the preceding and si- 

 milar experiments, I was persuaded that the re- 

 moval of the brain or spinal cord had no influ- 

 ence whatever on the apparent developement of 

 animal heat, nor on the degree and velocity of 

 cooling. Still, I could not flatter myself that any 

 of the measures I designed to imitate the natu- 

 ral function of respiration, proved even the slight- 

 est increase of temperature. As I did not consi- 

 der the experiments already detailed sufficient- 

 ly decisive on this point, I proposed to arrest 

 the circulation of blood in the lungs by tying 

 the heart at its base. The animal being made 

 insensible by a blow upon the occiput, the chest 

 was immediately opened, and the object being 

 accomplished, the divided parietes were again 

 closed, and the inflation of cold air commenced 

 as in other instances. The following experi- 



