334 Dr. A. D. Waller and Miss S. G. M. Sowton. [June 12, 



SECOND NERVE. 



Current of 



injury. Neg. var. 



hours. In bet. hyd., 2 p. c., for 1 hour ... + 17 -4 



1 +12 



New transverse section + 70 



12 In saline for 12 hours* -1,4-6 



New transverse section + off -33 



12 J In bet. hyd., 2 p. c., for 1 hour ... +54 



16 New transverse section >+110 



25 In saline for 12 hours -11 



Then new transverse section - 1 7 



Then interpolar crush 



With reversal of excitation 



Exp. III. Betaine Hydrochloride. 2 per cent. 



Two nerves removed and placed at once in betaine and tested 

 3J hours later gave response ; transferred to saline and tested 9 hours 

 later, when they gave respectively 0-0025 and O'OOll volt. After 

 interpolar crush these responses disappeared. 



Exp. IV. Betaine Hydrochloride. 10 per cent. 



After 16 hours in saline 5 



After soaking in betaine for 1 hour 



After 4 hours in saline - 2 



Ditto after new transverse section - 6 



After interpolar crush 



Exp. V. Betaine Hydrochloride. 1 per cent. 



After 15 hours in saline - 5 



After 1 hour in betaine - 10 



After 5 hours in betaine 1 



After 9 hours in betaine 



Ditto after new transverse section 



After further 1 4 hours in saline - 3 



After further 12 hours in saline 4 



Ditto after new transverse section - 9 



Ditto after interpolar crush 



Exp. VI. Musearine Hydrochloride. 1 per cent. 



First Second 



nerve. nerve. 



Normal response -8 -14 



After soaking in muscarine solution for 5 hours ; 



new transverse section , 



After soaking in normal saline for 8 hours 



* Plate 3503. 



