352 Messrs. G. A. Buckmaster and J. A. Gardner. [Aug. 19, 



Experiment 2. — Effect of moderate ventilation of the lung prior to the 

 administration of 2 per cent, chloroform (fig. 2) : — 



Fig. 2. 



Depth of respiration, 1 division = 14-29 c.c. ; time interval, 30 sees. ; |, 2 per cent, 

 chloroform on. 



Table II. — Measurements of Tracing in Fig. 2. 



Intervals 

 of time, 

 in minutes. 



Anaesthetic. 



No. of 

 per minute. 



Average depth 

 of respiration. 



ventilation, 

 in c.c. 



1 



0-5 

 0-5 

 0*5 

 0-5 

 1 







2 per cent. CHCl :j 



55 

 24 

 19 

 26 

 33 

 64 



48 -28 



26 -86 



27 -14 

 30-71 

 29-0 

 26 -14 



2656 

 1699 



Experiment 3. — This shows the initial danger-point in chloroform 

 anaesthesia, an effect of moderate rate with deep respiration prior to the 

 administration of 2 per cent, chloroform (fig. 3) : — 



