Figure 7 ^ . Utrecht, Holland. Physiological Institute.
Noyons1 respiration chamber for cats, in which the oxygen is
written on a spirometer and the carbon dioxide absorbed in
caustic potash but subsequently released by acid, in accordance
with the principle of Snipping.
Figure % . Utrecht, Holland. Physiological Institute.
Another view of Noyons' cat respiration chamber. In the background
is the spirometer and kymograph. Also the activity is recordedXjiajl