84 



Chapter VI 



Effect of chloroform. 



FIG. 48. Upper tracing represents record of puppy's heart. Lower tracing = blood pressure 

 of the perfusing animal. Period I normal. Period II shows the effect of injecting 

 20 minims of CHC1 3 water. The signal mark represents the time during which the 

 sample of blood was taken. 



Gas per min. 



Period I. Before injection of chloroform water 

 Period II. After injection of chloroform water 



(K) Stimulation of the vagus. 



Oxygen 

 3-0 c.c. 

 0-37 c.c. 



Carbonic acid 



8-8 c.c. 

 1-9 c.c. 



III 



FIG. 49. Record of the movements of the heart of a small cat perfused from the 

 circulation of a large cat. Upstroke Asystole. Period I = normal. In Period II 

 the signal mark represents the time of vagus stimulation (coil at 10 cms.). The 

 third period corresponds to the after effect and in this period the third sample of 

 blood was taken. 



