48 



THE COirPOSITIOX OF EXPIRED AIR, 



The effects of temperature upon the duration of life in a confined space (and even in the open 

 air) are better shown in the roiJetilion of Richardson's experiments (8), as presented in Table J. 

 The results obtained in these experiments show that the duration of life is very perceptibly short- 

 ened through the influence of a higher as well as of a lower temperature than i8° to 2o°C. 



Table J. 

 " Richardson's" experiment. 



\Voit;hl. 



1.S94. (hams 



I Nov. 5 White 22 



mouse 



9 



10 

 II 

 12 



13 



14 



IS 

 16 



17 

 18 



19 



20 i 



2t 



22 



6 1 Gray 

 mouse 



6 



I 

 6! 



6 



9 



9 

 I 



9 

 9, 



White 

 mouse. 



Gray 

 mouse. 



10 



I 

 10 



10' 

 10 



13 

 13I 



'3 



White 

 mouse. 



22 



21A 



20+ 



18 



16 



22 

 I 2 



'3 

 1 2 



1 % 



Capacity 



of jar. 



C. C. 



600 



600 



Tempera- 

 ature. 



48^ C. 



o n 

 o n 



5 



0.0 



16.2°" 



58.' " 

 48.° " 



•9.5°-' 



19. 



13- 



50- 



39.5°" 



-4.5°" 

 -1.0° " 

 18. " 

 18. " 

 -4.0° " 

 ■7-5"" 



Atmos- 

 phere. 



Air. 



76.59 ^ O. 

 23.41 ^ N. 



90.8 ^ O. 

 9.2 ^ N. 



90.8 ^ O. 

 9.2 ^ N. 



90.8 ^ O. 



9.2 '^ N. 



90.8 ^ O. 

 9.2 % N. 



Air. 



Air. 



An interesting condition noted in autopsies upon a number of the animals that succumbed to 

 the conditions in the " Richardson " experiment was that of the blood in the heart of the animal. 

 In the cases where death supervened in a short time, the heart blood was fluid and seemed to lack 

 the power of coagulation, while in those cases in which death resulted after several hours' confine- 

 ment in the flask, the cavities of the heart contained firm, dark clots of blood. This condition of 

 the blood was, no doubt, due to the influence of the CO, generated by the animal during the 

 experiment. 



