352 Messrs. Hill, McQueen, and Flack. Conduction of the 



upon them. If the arm be not exsangnined the pulse returns at once to its 

 full amplitude in spite of the heavier extension weight (fig. 6, 1). 



M (I) 



Weight on 

 radial 300 gins. 



Radial 



M (2) 



Armlet 

 released 



Light weight on 

 radial 

 (150 gins.) 



Armlet 

 released 



Radial I 



M (3) 



II. We surround the upper arm with ice, while the lower arm is immersed 

 in hot water. After a few minutes the obliteration pressure is taken with 

 the armlet on the flushed forearm, while the upper arm is still encased in ice. 

 Under these circumstances we have generally found that the pressure in the 

 lower arm is 15-20 mm. Hg higher than it was before the experiment. 

 The ice is then removed from the upper arm and the pressure quickly taken 

 with the armlet there. In this case the pressure is generally slightly lower 



Heavy weight on 

 radial 

 (300 gms.) 



Fig. 6. 





Before experiment, 

 armlet round either upper 

 arm or forearm. 



Armlet round flushed 

 forearm, upper arm cold. 



Armlet round upper 

 arm, ice just removed. 





mm. Hg. 



mm. Hg. 



mm. Hg. 



Or. S. 



97 



120 



95 



Or. S. 



97-100 



120 



95 



J. McQ. 



130 



142 



125 



M. F. 



115 



125 



112 



M. F. 



105 



105 



85-88 







95 



(Other arm, 105) 



90-95 

 (15 minutes later) 



S. E. 



105-108 



115 

 105 



After application of ice 

 to forearm 



103-105 

 97 



(5 minutes later) 



