THE HOESE AND ITS DISEASES. 53 



Tar 



Tobacco 



Tonics 



Unguents 



Vitriol 



Vinegar 



WiUow Bark 



Zinc 



The various forms of Medicine. 



The usual forms in which medicine is administered 

 to a horse are those of balls, powder, drenches, clysters, 

 ointments, fomentation, and poulticing ; also, bleeding, 

 blistering, and physicing. 



Balls. 



There are some circumstances in the preparation of 

 this form of medicine not in general sufficiently attended 

 to by farriers. Substances that are volatile do not keep 

 well in balls, and therefore should only be made when 

 used. The same caution is also requisite with such as 

 liquify by the absorption of air. All hard substances en- 

 tering into balls, should be finely powdered, and the moist 

 matter that is to form them into an adhesive mass, 

 should be of a nature that will neither ferment, nor 

 become mouldy. Very dry and bulky powders are 

 no way so conveniently formed into a mass, or keep so 

 well, as by the addition of lard or palm oil. 



Diuretic Balls, and liow they act. 

 As we have but little power over the skin of the 

 horse, so we have correspondently a gi^eater one over 

 the kidnies. In the human being, the reverse of this 

 is the case; and the articles that act on the human 

 kidney, appear to do it more by a sympathetic effort of 

 the stomach, whereas, diurectics in the horse, at least the 

 greater number of them, appear to act primarily on the 

 kidnies by determining a gi^eater quantity of blood to 

 them, and by stimulating them to separate a larger 



