Materia Medica. 123 
4. Nitrate oi silver, 4 gr. Crumb of bread, enough to 
make a small pill, to be given twice a day, or divided 
according to the size of the dog. 
5. Astringent Wash for the Eyes—Sulphate of zinc, 
5 to 8 grs.; water, 20z. Mix. 
6. Goulard extract, 1 drm.; water, 1 0z. Mix. 
7. Nitrate of silver, 2 to 8 grs.; water, 1 0z. Mix. 
8. Wash for the Penis——Sulphate of zinc, 6 to 10 grs.; 
water, 1 oz. Mix. 
g. Chloride of zinc, $ to 14 gr.; water, 1 0z. Mix. 
10. Astringent Ointment for Piles——Gallic acid, to 
gts. ; goulard extract, 15 drops; lard, 1 oz. Mix. 
Blisters.—Blisters are irritant applications designed to 
produce inflammatory action in the skin. Their action, 
when continued, is attended with the formation of vesicles, 
or bladders, by which deeper-seated disease is overcome. 
They are also known as counter-irritants. Prompt rising 
of the blister is essential to successful treatment ; if these 
results are delayed or absent, the original disease proves 
refractory, and fatal issues may be expected. 
1. Fluid Blister—Olive oil, 20 parts; powdered 
cantharides, 1 part. Mix, and heat in a water bath for 
2 hours, then stand aside to cool. The fluid is then se- 
parated by straining through fine muslin, after which add 
2 drms. of oil of origanum. Apply a small quantity, and 
rub well into the skin before the application is repeated, 
otherwise the fluid will gravitate to lower portions and 
produce unnecessary irritation. 
2. Blistering Ointment.—Powdered cantharides, 1 part ; 
pure lard, 8 parts. Mix. This should: be prepared 
sometime before use. ; 
3. Powerful and immediate action, when called for in 
severe inflammation of important organs, may be induced 
by the application of a rag saturated in spirit of turpen- 
tine, or solution of ammonia, which should be covered 
with a piece of oil-skin or paper, and closely applied. 
4. Mild Blister Ointment (counter-irritant).— Hog’s 
lard, 4 oz.; Venice turpentine, 1 0z.; powdered can- 
tharides, 6 drms. Mix, and spread. 
5. Stronger Blister Ointment (counter-irritant).—Spirit 
