140 MAT£R]7\ MEDICA. 



secnis to be the same as the celebrated 

 Steers' s Opodeldoc. (See Pharm. article 

 Enibrocatiois.J 



It is a popular remedy for strains and 

 bruises, and is a very proper application 

 when the inflammation, which always ac- 

 companies those complaints at first, has 

 subsided, or have been removed by other 

 remedies. (See the CGmpendium.J 



ORIGANUM. The essential oil of this 

 plant is much used by farriers, as an ingre- 

 dient in their strain oils, or mixtures for 

 bruises. It is a very powerful stimulant, 

 and capable of doing much good in those 

 complaints : it is sometimes mixed with 

 mercurial ointment, oil of bay, and cantha- 

 rideb^, to form strong blisters. (See Pharm.) 



ORPIMENT. (See Arsenic, ijclloxc.J 



OYSTER SHELL, when burnt and levi- 

 gated, is employed as an absorbent.. 



The dose is about one ounce. 



OXIGEN. A constituent part of atmos- 

 pheric air, witliout which it would be unfit 

 for respiration. Im breathing;-, we deprive 

 the air of, this pure and vital principle ; it is 

 therefore unfit for the purpose a second 

 time; and if an aiMma! be confined in air 



