1911.] Ventilation of the Lung during Chloroform Narcosis. 355 



Table IV. — Measurements of Tracing in Fig. 4. 



Intervals of time 



respiration 

 was counted. 



Anaesthetic. 



Frequency. 



Average 

 depth of 

 respiration. 



Total 

 ventilation, 



Remarks. 



-25 min. before 



Recovery from 



19 



77 -46 



1472 

















1st half-min. 

 2nd 



3 per cent. 

 CHC1, on 



32 

 25 



37-24 

 36 -6 



1192 

 915 





3rd 





20 



56 -39 



1128 



Breathing ceased just 

 before end of 3rd 

 half -minute. 



4th 





2 



18-08 



36 



CHC1 3 off after the 

 4th half -minute. 



Experiment 5. — Effect of 3 per cent, chloroform with rapid but compara- 

 tively shallow respiration (fig. 5) : — 



Fig. 5. 



Depth of respiration, 1 division = 21 -28 c.c. ; time intervals, 30 sees. ; j, 3 per cent, 

 chloroform on. 



Table V. — Measurements of Tracing in Fig. 5. 



Intervals 

 of time, 

 in minutes. 



Anaesthetic. 



No. of 

 respirations 

 per minute. 



Average depth 

 of respiration. 



Lung 

 ventilation, 



1 



0-5 

 0-5 

 0-5 

 0-5 







3 per cent. CHC1, 



106 

 56 

 36 

 30 



55 -38 

 51-91 

 35 -96 

 31-06 



5870 



The whole data of this experiment are given in Curve II. 



