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





Arm, 



Leg, 



Dorsalis, L.H. 



Kemarks. 





armlet. 



armlet. 



small instrument. 





mm. TTg 



mm. Hg. 



mm. Hg. 





Qr 



225 



275 



139 



Myocardial failure. 



Gr' 



250 



295 



130 



(Temporal 135) 



,, ,, (aortic regurgitation 

 found post mortem). 



E 



215 



260 



130 



Myocardial failure. 



C 



185 



255 



100 





H 



130 



215 



45 



Aortic regurgitation. 



Ml 



180 



175 



65 



Chronic nephritis. 



M2 



170 



175 



55 



it >> 



C 1 



105 



175 



80 



Mesaortitis. 



In a normal individual we have found also that the variation in pressure 

 found on changing from the horizontal to the vertical position fully accords 

 with the effect of gravity, and that this is so when the readings are taken 

 from the dorsalis pedis or with the armlet round the leg. The dorsalis 

 reading in the vertical posture is increased by the gravity pressure just 

 as much as is the leg reading. 



The divergence in readings between the artery lying in tissues or 

 exposed lying on bone has been fully substantiated by us in animals. If 

 we place round the neck of a dog an armlet connected with a recording 

 manometer and at the same time record the blood-pressure in the carotid 

 artery by a v. Basch C-spring manometer, we find that the pressure required 

 to obliterate the pulse wave on the tracing of the C-spring is just about the 

 same as the actual systolic blood-pressure. To graduate the C-spring we 



Fig. 1. 



