I2 4 



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 Wj into the lower 



Pro. 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 

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

 ingoing air. 



