'l5^ MATERIA MEDICA. 



HESOLVENTS. Medicinesthat dispewe 

 lumours, either external or internal. 



KOBORANTS. Medicines that strength- 

 en the system. 



KOSIN, yellow and black. The former is 

 a weak diuretic, and sometimes given with 

 advantage to horses that are subject to svvei- 

 lino: of the leirs. The dose is about one 

 ounce, v^hicfi may be powdered and mixed 

 with the corn : it is necessary to continue 

 this medicine for several days, or until its 

 diuretic effect is considerable. Black rosin 

 is not used in medicine. 



ROWELLING. An operation often per- 

 formed in veterinary practice. It consists 

 in m.aking an incision in the skin, about an 

 inch in length, with a pair of short and 

 strong bladed scissars. The finger is then 

 introduced in order to separate the skin 

 from the subjacent parts all round the inci- 

 sion that the cavity may contain a circular 

 piece of leather about an inch and a half or 

 two inches in breadth: before this leather is 

 introduced, a hole is made in the centre 

 about half an inch in diameter; it is then 

 covered with tow (the hole being leftopei.}. 

 and smeared with digestive ointment: whoa 



