6 



CALORIMETERS FOR STUDYING RESPIRATORY EXCHANGE, ETC. 



Another view of the laboratory, taken near the door leading to the 

 refrigeration room, is shown in fig. 3. At the right is seen the balance used 

 for weighing absorbers, and back of it, imperfectly shown, is the case sur- 

 rounding the balance for weighing oxygen cylinders. On the wall, in the 

 rear, is the recording apparatus for electric resistance thermometers in the 

 water-circuit, a detail of which is shown in fig. 23. In the foreground in 

 the center is seen the observer's table; at the right of this is shown the 



SECTION 

 C- D 



BRINE COILS 

 RE HE ATE R BE NEATH 



*HV .:- A 



FIG. 6. Plan of heating and ventilating calorimeter laboratory, showing 

 general plan of circulation of the special cooling system and the posi- 

 tion of the thermostats and radiators which they control. The two 

 small diagrams are cross-sections of brine and heating coils. 



table for the absorption system, and at the left the chair calorimeter with 

 the balance for weighing subjects above it. The mercury-vapor light, which 

 is used to illuminate the room, is immediately above the balance for weighing 

 absorbers. 



The bed calorimeter and the absorbing-system table are better shown in 

 fig. 4, a general view of the laboratory taken near the temperature recorder. 

 In the immediate foreground is the table for the absorption system, and 

 back of it are the observer's table and chair calorimeter. At the right, the 



