364 Dr. W. Marcet and Mr. R B. Floris. The Efficiency 



The experiment was carried out by inspiring the external air through 

 a nasal tube and expiring through a mouth-piece into bell-jar receivers 

 suspended over water.* 



The following are the results obtained : 



Eelation between the Oxygen absorbed and the Heat emitted during 



Work. 



Consequently the oxygen absorbed does not follow exactly the 

 amount of heat produced ; but a number of experiments for separate 

 individuals show in each case means somewhat approximating each 

 other, though less obviously than in the state of rest. 



* The persons who submitted to these experiments had practised this mode of 

 breathing for a considerable time, and it had become with them quite natural. 



