BARK, PERUVIAN— BABLEY. 39 



very remarkable effect on the horse. I have 

 seen it do good, however, in gangrene, or 

 mortification of the external parts, when 

 mixed with opium, ammonia, and ginger. 

 It is serviceable also in cases of debility, 

 arising from large suppurations, and where 

 there is a copious discharge of matter. It 

 may be employed likewise in diabetes, a dis- 

 ease consisting in an excessive discbarge of 

 urine. 



The dose is from six drams to one ounce 

 and a half, or two ounces. 



There are three sorts of bark : the pale or 

 Jesuits, the red, and the yellow. The first 

 is considered the best, and is most com- 

 monly used, but the others do not greatly 

 differ in their effects. Oak bark would pro- 

 bably be found an useful substitute for peru- 

 vian bark. By boiling bark in water a con- 

 siderable time, its virtues are said to be con- 

 siderably diminished. 



BARLEY is sometimes used as food for 

 horses ; but is less fit for that purpose than 

 oats, or beans : 1 have known it tried as a 

 substitute for the former, when it was found 

 difficult of digestion, and productive of 

 my complaints : if horses, however, be 



