74 VEGETABLE DRUGS WITHOUT ORGANIC STRUCTURE. 



is insoluble in water but soluble completely in an equal 

 weight of warm alcohol. The crude drug has from 15 

 to 20 per cent, of organic detritus, the main elements of 

 which are readily distinguishable under the microscope. 



Chemistry. — The main constituents of styrax consist of 

 cinnamic acid esters of various alcohols. According to 

 Fehling,* the following is the composition of styrax: 



Styracin S to 10 per cent. 



Phenylpropyl cinnamate 10 



riniijiinic acid, Slcn.iiKstcr. .•...,.. lO to ao 



Alpha Hila Store 111 50 . || 



Ciiinainic acid a to 5 



Si viol a to 3 '* 



Vanillin 0.5 " 



According to Miller, f the American styrax contains 

 styracin and phenylpropyl cinnamate, whereas the ethyl 

 and benzyl ester cinnamates are lacking. 



* Neues Handw6rterbuch dor Chemie VI, 1898, p. 1375. 

 t Liebig's Annalen, aao, i88a, p. 648. 



