Death results in 8-20 minutes. Values are averages of 4 dogs for first five minutes of breathing time, and of 3 dogs 

 thereafter. 



HI Ratio of experimental ventilation to ventilation of healthy dog at rest. Ill Ratio of experimental ventilation to 

 ventilation of same dogs at start (minute before anoxia). /3/ Minute before anoxia. /4/ Observations taken a few 

 seconds before cardiac failure. 



Contributor : Swann, H. G. 



Reference : Swann, H. G., and Brucer, M., Texas Repts. Biol. M. 7:539, 1949. 



117. EFFECT OF PROGRESSIVE ANOXIA ON PULMONARY FUNCTION: DOG 



Rebreathing through soda lime into a spirometer of 3.52 liter capacity; death resulting in 15-28 minutes. Values 

 are averages of 4 dogs for first 14 minutes of breathing time, and of 3 dogs thereafter. In this type of anoxia, 

 increase in ventilation is apparently due to increase in respiratory rate (compare Columns B and D). 



III Ratio of experimental ventilation to ventilation of healthy dog at rest. IZl Ratio of experimental ventilation to 

 ventilation of the group of 4 dogs during minute before anoxia. /3/ Minute before anoxia. /4/ Observations taken 

 a few seconds before cardiac arrest. 



Contributor : Swann, H. G. 



Reference : Swann, H. G., and Brucer, M., Texas Repts. Biol. M. 7:553, 1949. 



118. EFFECT OF HYPERVENTILATION ON BLOOD CO^ CARRIAGE: MAN 

 Values are averages of 3 subjects, hyperventilated in a body respirator for 24 hours. 



/I/ At PCO2 of 40 mm Hg. 



Contributors : (a) Vandam, L. D., (b) Swann, H. G. 



Reference : Brown, E. B., Campbell, G. S., Johnson, M. N. 

 Physiol. J^: 33, 1948. 



Hemingway, A., and Visscher, M. B., J. Appl. 



157 



