928 
EXTRACTS FROM EXCHANGES. 
The Treatment of Periodic Ophthalmia with Inter¬ 
nal Administrations of Iodide of Potassium [Dor ].— 
D. made bacteriological examinations of an eye epizootic in 
Auxonne, and claims to have successfully obtained pure growths 
of the specific microbe, with which he was able to produce the 
disease in test horses by inoculations. On the ground of his cul¬ 
ture experiments, he also states that the specific agent of this 
eye malady can not withstand alkalies, and experimented to 
suppress the disease by intravenous and rectal injections of 
alkalies. Among the applied agents, the iodide of potassium 
proved to give the best results in the treatment of the inocu¬ 
lated disease, while the control animals were very severely 
affected. D. administered daily 15 to 18 gm. of the iodide of 
potassium in a 1 per cent, solution, intravenously, or 25 to 30 
gm. by os. In one case of periodic ophthalmia D. succeeded in 
bringing about a resorption of a severe hypopion in 48 hours 
with the administration of the iodide of potassium.— [Bull, de 
Soc. Centr. de Med. Veil) 
Operative Removal of a Cystic Calculus [Dr. Vogt]. 
—The urine of a horse for several years was bloody, especially 
so after great exertions. The examination reveals beside an 
emaciated condition, great quantities of fibrin flocks in the 
urine, slimy sediments and blood clots, considerable albumen 
and calcium carbonates. The rectal examination reveals the 
presence of a calculus of the size of a lemon in the bladder. 
Operation through opening of the urethra, close under the rec¬ 
tum. The stone had to be crushed and removed in pieces. 
Bladder, urethra and wound were irrigated with a 1 per cent, 
tannoform solution, at body temperature, the external opening 
of the wound was closed by stitches. The weight of the stone 
was 90 gm. and consisted chiefly of carbonate of lime. About 
a month after the operation a membrane was removed through 
the wound, which, by its extension, entirely lined the internal 
surface of the bladder, and containing great quantities of crys¬ 
tals and yellow sand particles. Besides a large amount of sand, 
a calculus of the size of a pigeon’s egg was washed out in the 
irrigation of the bladder with a solution of boracic acid. 
Complete recovery took place inside of four months.—( Deutsch 
Thier. IVochen.) [A similar and very skillful operation I had 
the pleasure of witnessing at the American Vet. Hospital, 
while acting there as house surgeon, and which was performed 
by Prof. Dr. W. J. Coates. The presence of a large calculus 
was established, and an operation for its removal was decided 
