206 PHARMACOPCEIA. 



when it is given ; and some water or water- 

 gruel should be given immediately after. 



It is generally necessary to give balls 

 wrapt in paper; but for this purpose the 

 thinnest tissue should be preferred. 



BLISTERS. Applications which inflame 

 the skin, and cause watery bladders to form 

 upon it. 



They are used on various occasions, and 

 form a very important class of remedies. 



MILD BLISTER OINTMENT. 



No. I. Hog's lard, four ounces.. 



Venice turpentine, one ounce. 

 Powdered cantharides, six drams. — 

 Mix. 

 No. 2. Oil of bay, three ounces. 



Oil of origanum, two drams. 

 Powdered cantharides, half an ounce. 

 Mix. 



STRONGER BLISTER OINTMENT. 

 No. 1. Oil of turpentine, one ounce* 



Vitriolic acid by measure, two drams. 

 Mix carefully, in a chimney or open place, 

 and add of hog's lard four ounces. 



Powdered cantharides, one ounce. 



Mix. 

 No. 2. Mercurial ointment, and oil of bay, , 



