THE COLLEGE VETERINARY PHARMACOPOEIA. 561 
are very suspicious circumstances. The plethoric habit of the 
mare, and hard work on the preceding day, and the state of tile 
vessels of the udder from her suckling, might have laid the foun¬ 
dation for greater and more extensive inflammation.— Edit. 
4 
REMARKS ON THE PHARMACOPOEIA IN USE 
AT THE ROYAL VETERINARY COLLEGE. 
/ 
[Continued from page 509.] 
The next division of the Pharmacopoeia is into that of 
Infusions. 
At the head of them stands the infusion of that valuable, I was 
going to say only legitimate and valuable vesicatory of the vete¬ 
rinarian, cantharides. 
Infusion of Cantharides . 
Cantliarides in powder ....two ounces 
Vinegar......two pints 
Macerate ten days, pour off the liquor, grind the flies with a 
handful of fine sand, return the whole into the bottle, macerate 
a week, then strain. 
The active principles of cantharides are soluble in water, and 
in diluted alcohol, and, to a sufficient extent, but not perfectly, in 
spirit of turpentine; but the use of vinegar as a menstruum, was 
perfectly new to me, and I somewhat doubt its propriety. At 
all events, I must make my own vinegar, for the quantity of sul¬ 
phuric acid with which manufacturers are permitted to adulterate 
vinegar, would materially injure my infusion. I should have sul¬ 
phate of canthariden, which would probably be precipitated and 
lost. A deceased and valued friend, and an excellent practi¬ 
tioner, used the simple watery infusion of cantharides, with 
sufficient spirit to prevent decomposition. He could produce 
as active a blister as he liked, and he never moved the hair, or 
blemished the horse. 
Infusion of Tobacco . 
Tobacco —.... one pound 
Boiling water -. . ...one gallon 
Infuse twenty-four hours, and strain. 
I have no objection to this infusion, except that I have never 
seen it do much good in mange in the horse, and not often in 
cattle : I have destroyed many a dbg with it; on the other hand 
I have cured many a sheep of the fly and the scab. This is the 
form under which tobacco should be used as an injection. 
