124 



A RESPIRATION CALORIMETER. 



the heat. Two coils of such pipe, one above the other, comprise the 

 heat-absorber. The water for taking away the heat enters the calo- 

 rimeter chamber through a brass tube in the wooden plug in the front 

 end of the chamber, flows through the rubber tube W l into the lower 



FIG. 32. Sectional View of Walls of the Chamber, showing method of installing air-pipes, water- 

 pipes, and rod for raising and lowering shields. The copper wall A, zinc wall B, and two 

 wooden walls C and D are penetrated by the box E for the air-pipes F and G and by the wooden 

 plugK. The electrical lamp I shows method of heating, and the water coil J that of cooling, the 

 ingoing air. 



