208 



Dr. A. D. Waller. On the 



[Oct. 23, 



Indubitable response, negative to positive (antidrome) and negative 

 to negative (homodrome), to single shocks, was observed on the 4th 

 day, absent on the 5th day. 



Eesponse, negative to negative, with strong tetanisation in both 

 pairs of directions, was still present on the 5th and 6th clays. But on 

 the seventh day the only visible effects were of polarisation direction, 

 i.e., the lens was judged to be dead. 



Exp. 27. (November 19, with Sir J. Burdon-Sanderson.) — Lens of 

 rabbit eye, removed 4 hours post mortem. Normal current 0*0150 volt 

 positive declining. 



1st lens. 



Excitation by single shock, 



Coil at 1000+ - -0-0006 



- = -0-0010 followed by 

 positive after- 

 effect. 



Excitation with the ABC method. 

 By single induction shocks. 



(1st day). 



B C A 

 Coil at 5000 ^ + 



5000 ^ 



2nd lens. 



S.s. 1000 



+ 



S.S. 5000 Exc. 



Exc. 



- +0-0003 



= +0-0002 



= -0-0005 



= -0-0012 



= -0-0002 



= -0-0015 



= nil. 

 nil. 



= +0-0005 



= +0-0002 



