ILLUSTRATIONS. 



Page. 



Platic I V. The respiration calorimeter 1038 



V. Moilel of respiration calorimeter, showing general i)lan and details 



of construction 1038 



YI. The meter pump and absorption tubes 1042 



VII. Arrangement of heating wires, cooling pipes, etc 1042 



Fig. 11. Vertical cross sections 1039 



12. Horizontal cross section 1040 



X 



