50 parts, or by weight 16 oz 



Alcohol, 100 parts, or by measure 2^ pints 



Macerate the herb with Alcohol for fourteen days, 

 then express the liquid, and filter. (50 per cent, of 

 fresh herb). 



How does a Tincture differ from a Spirit? The 

 latter are solutions of volatile substances in alcohol, 

 while the former, with one exception, are of non- 

 volatile substances. 



What menstrua are used in preparing them? 

 Alcohol, diluted alcohol of various strengths, aro- 

 matic spirits of ammonia, or mixtures of alcohol, 

 water and glycerin. 



What great advantage does percolation have over 

 maceration in respect to the character of the liquid 

 left in the residue? Maceration leaves a finished 

 tincture in the residue; in percolation, it is merely 

 menstruum, the active portions of the drug having 

 been dissolved in the preceding percolate. 



Give the ingredients of Tinctura Opii Deodorata 



Powdered Opium 10 parts 



Ether 20 parts 



Alcohol 20 parts 



Water Q. S 100 parts 



Give the ingredients of Tictura Lavandulae Com 

 posita. 



Oil of Lavander 8 parts 



Oil of Rosemary 2 parts 



Cinnamon [powdered] 18 parts 



Cloves 4 parts 



Nutmeg .10 parts 



Red Saunders 8 parts 



Alcohol 680 parts 



Water 270 parts 



Diluted Alcohol, Q. S 1,000 parts 



95 



