Nos. 

 1, 



2, 



3, 



4, 



5, 



6, 



7, 



8, 



9, 

 10, 

 11, 

 12, 

 13, 

 14, 

 15, 

 16, 

 IT, 

 18, 

 19, 

 20, 

 21, 

 22, 



Mean duration of life. 



21' 



32 



10 



15 



20 



22$ 



Now if we compare birds to mammals, we see that generally 

 mammals resist asphyxia more than birds. The two following 

 tables show the difference : 



TABLE IX. 

 Mammals. 



Guinea-pigs . 

 Rabbits 



Mice 



Cats 



III. 



Average 



7*' 



21 



23 

 32 

 334 



TABLE X. 

 Birds. 



Pigeons 



Sparrows . ,. !,. 



Jays 



Raven 



Sparrow Hawks . 



Mag-pies ; / 



Average 



7' 



10 



15 



18| 



20 





 15-J 



Influence of the temperature of adult warm-blooded animals 

 on the duration of life when they are asphyxiated. 



I have discovered that the degree of the temperature of adult 

 non-hybernating vertebrata has also a great influence on their 



