140 



Prof. J. A. MacWilliam. On the 



[Oct. 24, 



extensive — may give a tracing differing relatively little from the first 

 loading — in marked contrast with what happens in a contracted artery. 

 The elongation caused by the first weight (in the second loading) is 



Jugular vein (Sheep) 

 Langitud, strep ^ 



5 (yr/iL 

 increment 





Fig. 22. 



Fig. 23. — Carotid (ox), in contracted state, a few hours after death was put into 

 2 per cent, solution of salicyl-sulphonic acid and kept in the solution for 

 24 hours. Transverse strip then loaded. Second loading after interval of 

 15 minutes. 



small ; the subsequent ones are somewhat larger than before — to dimi- 

 nish after a time. When the first stretching is very extensive, the 

 second weighting may give results more resembling those got with 



a contracted artery. 



Relation of Cubic Capacity of an Artery to Internal Pressure. 



Various observers have investigated this subject, but their results are 

 very discordant. 



