231 
of the optic nerves. 
center of vision, and, from want of due consideration, had 
been considered as temporary insensibility of the right eye ; 
but he is now satisfied that this is not really the case, but that 
both eyes have been similarly affected with half-blindness. 
This symptom of his indigestion usually lasts about a quarter 
of an hour or twenty minutes, and then subsides, without 
leaving any permanent imperfection of sight. 
I have not seen the subject of the 5th case, but I am in- 
formed that he has had many returns of this affection, gene- 
rally attended with head-ach, and always lasting about 
twenty minutes, with very little variation. 
From the Press of 
IV. NICOL, 
Cleveland-roui, St, James’s. 
