EXTRACTS FROM EXCHANGES. 
707 
an increase in the amount of blood was noticed, while in old 
ones a slight decrease. (6) An increase in the weight of the 
bony skeleton was noticed in all cases after the operation. (7) 
The operated animals were all stronger and livelier than the 
control animals. In cases where two male animals, one of 
which had the vas deferens ligated, were put in a cage with a 
female, the animal operated upon always copulated, driving the 
one not operated upon from the field. 
ENGLISH REVIEW. 
Toxicological Effects of Izal on the Dog and Cat 
[By F Hobday \.—Izal is a disinfectant and parasiticide which 
has gradually worked its way into veterinary and medical prac¬ 
tice, and, although it is claimed as absolutely non-poisonous 
and non-irritant, Prof. F. Hobday records experiments in dogs 
and cats which have proved it to possess different properties, 
the use of the drug having proved fatal in two cases. From his 
experiments the Professor says : u I am convinced izal is poison¬ 
ous to dogs and cats if used injudiciously. Its action is irritant 
and narcotic and its use in these animals, especially when ap¬ 
plied to a large area of the skin, must be attended with discre¬ 
tion, as in some animals which seem to be well out of danger 
paralysis and death ultimately ensued.—( Journ. of Comp. Path, 
and Therap.') 
Arsenic on a Growth of the Fetlock [By H. Gray , 
M. R. C. V. A.].—A thoroughbred mare was brought five years 
ago to the author for a fingerlike growth on the off hind fet¬ 
lock. This was excised and the base well burned with the 
actual cautery. It soon reappeared much larger than before. 
Various caustics (such as sulphonol, nitric acid, chromic acid, 
chloride of zinc, bichoride and biniodide of mercury, iodine with 
and without carbolic acid), were used alternately with the ac¬ 
tual cautery, but notwithstanding these the growth kept on 
recurring and enlarging, until it had become of such size as to 
interfere with the work of the animal. The whole fetlock had 
enlarged and was continuously struck by the other foot. The 
author then resorted to the use of an ointment of arsenic made 
of one drachm of white arsenic and one ounce of ung. picis Bur¬ 
gundy—a small portion of which was carefully rubbed on the 
centre of the growth every third day. After a few applications 
the tumor began to decrease and after three months of treat¬ 
ment finally disappeared.— {Journ. of Comp. Path, and Therapy 
