1 1 KECTS OF CARBON DIOXIDE. 



-? 1 3 



and reeovery, animals of the same species, age and - above, 



were exposed to a stream of pure carbon dioxide for definite 

 lmuli- of time ranging from one minute to five hours. The 

 animal- were then removed from the tubes, the time to the first 

 movement a- well as the time until the animal- ret >\ered was 

 noted. 



TABLE III. 



: AIION BETWEEN FIRST MOVEMENT AND RECOVERY AFTI i KE 



TO THE GAS FOR DEFINITE PERK 



Table III. gives the average values obtained from 45 animals, 

 and 37 exposures to the gas and 136 endpoini-, several animal- 

 Iteing used in each exposure. 



< .enerally, it may be said, from the data of Table 111. and I 

 2, curve B, that the longer the exposure, the longer the time 

 leqnired for the animal to recover. As for the time- relation 

 beiueen t he first movement and final recovery, 1 1 < utticiently 



little \ a rial ion as seen in Table III., columns .1 and A', to a --nine 

 thai \\ithin the limits of one to forty minute- e\|o-mc. the 

 animal- are a fleeted, physically or chemically, in a similarly 

 ie\er-il>le manner. However, the longer e\])o>ure> take a 

 relati\el\ l"ii-i r time for recover> - . 



( oluiim- .1 ' and B' of Table III. and curve- .! ' and />" ol' I i;^. 2, 

 -how the rate of first movement and of reo-\ er\ , |ur minute 

 exposure, to follow the same type of curve. Tin- perhap- 

 -i^niiie- i ha! reversibility is of the same nature in all 

 Variation in points determined, preventing regular cur\e- are 

 attributed to individual physiological difleren. t- in response. 



