MUELLER VALVES AND BENEDICT APPARATUS. 



197 



quotient is the same. The total ventilation and volume per respiration 

 with the Mueller valves are also higher, the difference being due in 

 part to the larger dead space with this method. 



TABLE 35. Respiratory exchange in comparison experiments with Benedict respiration 

 apparatus (spirometer unit) and Mueller valves with Tissot spirometer. (Without food.) 



