540 VEGETABLE DRUGS 



by solution in hot alcohol and crystallization. Nataloin is 

 derived from Cape aloes. 



Properties. — Minute, acicular 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, k a, 3 ii.-iii. (8.-12.); D., gr.ii.-xx. (.12-1.3), in 

 combination with other purgatives. 



PREPARATIONS OF ALOES. 



The oflacial preparations are numerous, but are not applicable to 

 veterinary practice. 



Tinctura Alo^s et MyrrhcB. 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 External. — 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 excite salivary and gastric secretioD, together 

 with the movements and vascularity of the stomach, and 

 appetite. Experiments on dogs show that large doses of 

 aloes increase the secretion of bile by stimulation of the 

 liver. Aloes is absorbed from the digestive tract and is 

 eliminated by the bowels, kidneys and mammary glands. It 

 may be excreted in sufficient quantity in the milk to create 

 looseness of the bowels in nursiug animals. 



Aloes stimulates peristalsis of the large intestines, but 

 does not notably increase the secretions in the bowels. 

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

 ably happens because the drug does not act till it reaches 



