566 VEGETABLE DKUGS 



hj solution in hot alcohol and crystallization. Nataloin is 

 derived from Cape aloes. 



Properties. — Minute, acieular crystals, or a micro-crys- 

 talline powder, varying in color from yellow to yellowish- 

 brown ; odorless, or possessing a slight odor of aloes ; of a 

 characteristic bitter taste, and permanent in the air. Bar- 

 baloin and socaloin are soluble in about 60 parts of cold 

 water. Barbaloin is soluble in 20 parts of alcohol. Socaloin 

 in 30 parts of absolute alcohol. 



Dose.—R. & C, 3 ii.-iii- (8.-12.); D., gr.ii.-xx. (.12-1.3), in 

 combination with other purgatives. 



PREPARATIONS OF ALOES. 



The official preparations are numerous, but are not applicable to 

 veterinary practice. 



Tinctura Aloes et Myrrhce. Tincture of Aloes and Myrrh. 



(U. S. P.) 

 Synonym. — " Elixis pro," elixir proprietas Paracelsi, E. 

 Made by maceration and percolation of purified aloes, 100 ; myrrh, 

 100; and liquorice root, 100; with alcohol and water to make 1000. 



Action Eodernal. — Aloes is a slight stimulant to raw sur- 

 faces. It is absorbed from the denuded skin and thus may 

 occasion purging. 



Action Internal. — Alimentary Canal. — Aloes is first of all 

 a purgative. In addition to this it is a bitter, and therefore 

 small doses escite salivary and gastric secretion, together 

 with the movements and vascularity of the stomach, and 

 appetite. The activity of aloes in the bowels is due largely 

 to the solvent action of bile upon it. Aloes is absorbed 

 from the digestive tract and is eliminated by the bowels, 

 kidneys and mammary glands. It may be excreted in suffi- 

 cient quantity in the milk to create looseness of the bowels 

 in nursing animals. 



Aloes stimulates peristalsis of the large intestines, but 

 does not notably increase the secretions of the bowels. 

 Moreover, its action is very slow (12-24 hours). This prob- 

 ably happens because the drug does not act till it reaches 



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