ELEMENTARY DEMONSTRATIONS 



131 



FIG. 108. The Httrthle kymograph. 



A B 



Fio. 109. Record of arterial pressure and respiration (A) beforehand (B) one minute 

 after dividing the vagi. The upstroke marks inspiration. The arterial pressure rose 

 from 150 to 180 mm., the pulse rate from 110 to 260. Respiration fell from 24 to 10. 

 The expirations became strenuous. (Burdon Sanderson.) 



