300 VETBRINAKY MATERIA MBDICA. 



without the aid of heat. Is ready for use in about 

 ten to twelve days after preparation. 



Euphorbium, an acrid resin obtained from the Eu- 

 phorbia resinifera, natural order Euphorbiacese. Is a 

 very energetic irritant, vesicant, and pustulant, but 

 for horses and dogs is rather too unmanageable. An 

 alcoholic solution (six per cent.) is said to be the bet- 

 ter way of using it as a vesicant. It is, however, 

 sometimes added to blistering ointments to increase 

 their activity. 



Olemn Tiglii. See under Croton Oil. 



Emollients and Demulcents. 



Petrolatum, petroleum jeUy, commonly called vas- 

 eline, cosmoline, etc. Is a jelly-like preparation, ob- 

 tained from the residuum of petroleum and afterward 

 purified. It is soluble in ether, chloroform, fixed and 

 volatile oils; insoluble in alcohol and water. It is 

 tasteless or nearly so, odorless, and of a neutral reac- 

 tion. It is non-oxidizable, and hence does not become 

 rancid, and therefore makes a most excellent basis for 

 ointments. It is used as an emollient and lubricant ; 

 also as an excipient in making boluses and electuaries. 



Mel, honey. A saccharine secretion deposited in 

 the honeycomb by Apis mellifica, the honey-bee, an 

 insect of the order Hymenoptera. 



Mel Despumatum, clarified honey, is honey 

 warmed, skimmed, and strained, with five per cent, 

 of glycerin added. 



Oxymel consists of honey 40, acetic acid 5, and 

 water 5 parts. 



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