TRANSLATIONS FROM CONTINENTAL JOURNALS. 423 
was reported to be affected with some disease of the eyes, as 
at night it seemed not to walk so straight and steady as usual, 
and when taken out of harness, he could not find his way to 
the stable without being led. This had existed about ten 
days. On examining the eyes nothing could be seen, either in 
their conformation or transparency of the humours, and the 
usual experiments were also tried to ascertain the mobility of 
the iris, and it was found that they were affected by the dif¬ 
ferent degrees of light thrown upon them, which proved the 
integrity of the optic nerves. The actions of the horse 
were free and without hesitation. On examining the horse 
after sunset, it was with difficulty that he could be brought 
out of the stable; he held his head up, extended his neck, 
and lifted his legs in an extraordinary manner. He could 
not be made to walk fast; kept moving his ears backwards 
and forwards; if left to himself in the yard he would stand 
still; if made to move he w ould run against any object in 
his way ; but after a time he would find his way back to the 
stable with more or less difficulty according to the position 
in which he had been left. 
The iris was now observed to contract very little by hold¬ 
ing a lighted candle before the eyes, which were fixed and 
prominent, the cornea also seemed less transparent. The 
appetite was good, and the horse presented no sign of disease 
existing. He had been employed for about a fortnight, in 
the heat of the day, in a court surrounded by a w hitewashed 
wall which strongly reflected the sun. After having taken 
all things into consideration, the author came to the conclu¬ 
sion that there w 7 as no organic lesion in the eyes of which 
this hemeralopia w 7 as the symptom, and that the cause could 
be no other than a diminished sensibility of the retina, 
which, according to his opinion, consisted in a sort of venous 
hyperaemia of the delicate network surrounding the nerves, 
produced by the intense light which w r as throw n on it during 
the time the horse w 7 as employed in the sun. 
The treatment first consisted in giving perfect rest in a 
place moderately lighted, placing on low 7 diet, bleeding 
from the jugular vein, &c. That not having produced 
any amendment, setons and blisters were applied to the 
neck and undersides of the jaw. These were conti¬ 
nued for a fortnight, when the horse was again examined 
in the dark, and a decided amelioration was perceived to 
have taken place. When he was left at liberty there was 
less hesitation in his movements, and when a lighted candle 
was held to the eyes the pupils contracted considerably, 
while the eyes were freer in their movements. 
The setons were now 7 withdrawn, and the horse was mode- 
