AND PHARMACOPCEIA. 549 



peared in many Instances while taking those medicines, but at 

 the same time some local remedies were employed, that is, the 

 farcy sores were dressed with some caustic, escharotic, or deter- 

 gent composition ; and it is well known that farcy, i. e. the sores, 

 buds, and all the external symptoms or appearances, may gene- 

 rally be removed by external applications alone ; therefore, it is 

 uncertain what share the tonic, whether it be arsenic or blue 

 "vitriol, has had in the cure of the disease. Another circumstance 

 to be considered is, that farcy, though apparently cured by means 

 of those strong medicines, is often not really or permanently 

 eradicated, but frequently is succeeded by glanders ; and, though 

 the interval between the disappearance of farcy and the appear- 

 ance of glanders is sometimes considerable, there are circum- 

 stances which render it extremely probable that they are con- 

 nected, and depend on the operation of the same cause. But 

 whatever share arsenic, blue vitriol, or sublimate may have had 

 in the cures that have been effected, whether permanent or only 

 temporary, small doses have generally been found sufficient ; 

 that is, of arsenic, from ten to fifteen or twenty grains ; subli- 

 mate, from ten to fifteen grains ; blue vitriol, from half a drachm 

 to one drachm, or, at most, two drachms ; white vitriol, from one 

 to three drachms. The experiments, therefore, in which large 

 doses have been given, such as two drachms of arsenic or subli- 

 mate once or twice a day, and continued for some time, should 

 never be repeated, as they arc really more likely to defeat the 

 purpose for which they are given than to promote it ; and there 

 can be no doubt that, notwithstanding the little immediate effect 

 they appear to have on the stomach, this important organ is often 

 most seriously and permanently injured by them. 

 The following are formulae for tonics : — 



No. 1. Arsenic from 5 to 10 grs. 



Sulphate of copper ^ dr. 



Opium ^ dr. 



Powdered caraways ^ oz. 



Treacle, enough to form the ball. 



No. 2. Arsenic 5 to 10 grs. 



Opium i dr. 



Sulphate of zuic 2 dr. 



Caraway seeds i oz. 



Treacle, enouoh to form the ball. 



No. 3. Powdered cantharides 6 to 12 grs. 



Sulphate of iron 2 drs. 



Gentian 2 drs. 



Ginger 1 dr. 



Ti'eacle, to form a ball. 



N N 3 



