PLATE XCIV 



Apparatus connected with, the respiration calorimeter 



A, Tension equalizer. B, Mixing bottle for equalizing the temperature of water 

 entering the heat absorber. C, Device for heating air entering the respiration cham- 

 ber. D, Preheater, and E, final heater, for raising the temperature of water enter- 

 ing the heat absorbers. There is an electric-heating coil in the lower half and an 

 electric-resistance thermometer in the upper half of the final heater. F, Tempera- 

 ture indicator comprising part of the apparatus for controlling the temperature of the 

 water entering the heat absorber. This device is connected with the resistance ther- 

 mometer in the final heater and with the galvanometer in the controlling mechanism 

 marked B in Plate XCV. G, Multiple-point switch for connecting the resistance 

 thermometers for the metal walls and air of the chamber with the Wheatstone bridge 

 for measuring their temperatures. H, Tube conducting air from the respiration cham- 

 ber to the rotary air pump. I, Tube conducting air from the purifying devices to 

 the respiration chamber. 



