SPRAINS. 149 



cantharides, of each half an ounce, in fine 



powder ; 

 Oil of turpentine, two ounces : 

 Mix them all together, and stir them till nearly 



cold. 



Before either of these blistering ointments is 

 used, all the hair must be entirely clipped off from 

 the callus, and the ointment be gradually rubbed 

 in with a spatula, or a dull case-knife. After the 

 first time of using the ointment, it must be rubbed 

 in with the fingers, and repeated every morning 

 for three times ; but, in cases of long standing, it 

 may be rubbed on for six or seven mornings toge- 

 ther. When the ointment is applied, the horse's 

 head must be tied to the rack, to prevent him from 

 gnawing the place with his teeth ; and the litter 

 must be taken away to hinder him from rubbing 

 the blister off before it takes effect, which is gene- 

 rally in six or eight hours. When the blister has 

 ceased to run, or on the third day after you have 

 done rubbing him, he may be turned out to grass 

 for two or three months : and if the callus be not 

 sufficiently reduced in that time, he must be taken 

 from his pasture, and the blistering ointment be 

 repeated as before. After this manner it may be 

 repeated until the cure is completed. 



The above blistering ointment (No. 112, p. 148) 



