148 MATERIA MEDICA. 



mercurials are, sublimate (muriated quick- 

 silver), red precipitate (red nitrated quick- 

 silver), turpeth mineral (vitriolated quick- 

 silver) and calomel, each of which is des- 

 cribed in its proper place. 



Quicksilver oxydated, or Calcined- 

 Mercnrx). A reddish powder, into which 

 quicksilver is converted by being kept in a 

 certain decree of heat a sufficient length of 

 time, and in a vessel adapted to the purpose. 

 It is an active mercurial, butrarelj employ- 

 ed in veterinary practice. 



The dose is from half a dram to one dram. 



RATTLESNAKE ROOT. This is now 

 neglected by medical practitioners, and in- 

 applicable to veterinary purposes. 



RAKING. A term employed by farriers 

 for an operation which consists in intro- 

 ducing the hand into the horse's rectum^ j 

 and drawing out any hardened excrement 

 that may lodged there. This mry gene- 

 rally be effected more to the purpose, and 

 with greater ease to the animal, by means of 

 glysters. 



REALGAR. A natural combination of 

 sulphur and arsenic, not used as a medicine, 

 (See Arscnic.J 



