EXOSTOSIS. 467 
ziven good results to Schmid, Peuch, Lamouroux. It is made in proportion 
wf 1 to 16, %, 4%, %. “The bony tumors, which like ringbones and callous 
spavin, frequently give rise to tenacious lameness, demand friction, repeated 
often with ointment, 4% to %.... If one uses an ointment to the 
16th, 12th or 8th, and rubs it slightly a few days apart, the treatment 
will leave no mark. If, on the contrary, a stronger ointment is used, if 
the frictions are frequent and severe, the bulbs of the hair are destroyed by 
the caustic, and the animal more or less blemished. The slough of the 
eschar is always slow ; sometimes even, when the quantity of bichromate is 
very small, it falls off unnoticed. In some cases, however, there is forma- 
tion of a small quantity of pus.’’? 
The numerous topics with secret composition, liquid fires, liniments, 
ointments, pomatums, praised against bony blemishes, have no superiority 
over the mercurial blister or ointment of biodine, which remain the agents 
most commonly used. There is some advantage to percute the tumor 
slightly with the plessimeter before applying the blisters. Flagellation and 
massage, already used in old times, have again been recently advocated by 
Félizet. Pressure over the tumor is a method of Lafosse, reintroduced by 
Moller. It is seldom used. When blistering has failed, firing is indicated. 
It has been advocated under all itsforms: in superficial points, lines, deep 
points. We prefer this last mode, which reaches the bone itself and gives 
tise in it to high inflammation; we pierce the skin through with one or 
two strokes of the cautery, penetrate into the bony tumor and cover the 
cauterized surface with a coat of blister. Praise of the penetrating 
points needs not to be made. Rey, Leblanc, André, Lavendhomme, Fou- 
cher, Abadie, have proclaimed the excellence of the method. 
But there are cases where cauterization fails: it is for them that the 
bistouri has been recommended. Sewel, professor ‘in the veterinary col- 
lege of London, invented, to produce the resorption of exostosis, the 
division of the periosteum on their surface. This operation—feriostotomy— 
has been used but little in France. To perform it a kind of bistouri having 
astrong blade with convex sharp edge and blunt point isused ; at the base 
of the exostosis an incision is made in which the periostotome is engaged ; 
pushed flat-wise under the skin, until it reaches the superior border of the 
‘tumor, the sharp edge is then turned on its surface and the periosteum is 
divided. According to Sewel, only a slight inflammation follows, and after 
ten or fifteen days the animal can resume its work. Reynal has obtained 
no good results with this operation. Bouley found it advantageous for 
subcutaneous growths, as splints, but “it is not the same with those 
situated under a complex fibrous apparatus, as ringbones and spavins, 
which cannot be interested in their thickness without having first divided 
1-Peuch, Journal-de Med. Vet., 1868, p.-440. 
