PLATE XXX 



General view of the respiration calorimeter: A , Opening serving as door and window 

 to chamber. B, Food aperture. C, Tank to catch water coming from the heat ab- 

 sorber in the chamber. D, Observer's table, with devices for measuring and regu- 

 lating temperattires. Other temperature measuring and regulating apparatus per- 

 taining to the calorimeter are not shown in this view. E, Thin rubber bag, resting 

 on shelf, to serve as air tension equalizer. F, Table on which are motor and blower 

 for maintaining circulation of air through chamber, and absorbers for purifying the air. 



(348) 



