BED RESPIRATION CALORIiMETER. 



15 



a pipe, C, extending to the rear, and passes it through purifiers, 1 , K, and 

 2, in which the water and carbon dioxide are removed. The air then 

 continues through a can containing sodium bicarbonate, which retains 

 any traces of acid fumes that arise from the rapid passage of the air 

 through the sulphuric acid. It finally returns to the chamber, oxygen 

 being admitted from a weighed cylinder at some point between the 



FIG. 1. Bed respiration calorimeter. 



A, tube leading to 10-liter Bohr meter; B, tube leading from meter to drier; C, outgoing air 

 pipe; D, mercury trap; E, leveling bulb for D; G, sodium bicarbonate container; F, rotary blower; 

 H, valve; K, soda-lime container; 1 and 2, sulphuric-acid containers. 



