THE IMPROVED ART OF FARRIERY. 517 



4. Oil of Juniper. 



Is otten added to diuretic balls, to increase their 

 eflfect ; it acts , however, principally as a warm aro- 

 matic. 



5. Oil of Petre. 

 Is only Barbadoes tar in oil of turpentine. 



6. Oil of Tar. 



Is a cheap penetrating distillation from tar, that may 

 be substituted for turpentine : but it may be better 

 employed in a mixture with whale oil, as a suppleing 

 matter for the hoofs. 



7. Oil of Origanum. 



Is a warm penetrating oil, and was formerly much 

 used among farriers as an external stimulant ; but it 

 possesses no powers superior to turpentine, and is 

 therefore little used by modern practitioners. 



8. Oil of Spike. 



Though much used by the older farriers, is nothing 

 more than oil of turpentine coloured with alkanet 

 root. 



