1891.] Colour of Cases of Tobacco Scotoma, fyc. 



507 



At 19 the light perception was so diminished that she could not 

 latch the grey. Her light perception extended further into the 

 /iolet (as white) beyond this point, as the subsequent measures 

 show conclusively. 



It seemed that it would be interesting to examine her eye for the 

 extinction of light by the same method as that described in my recent 

 japer. 



VOL. XLIX. 2 M 



