74 



EXTRACTA. 



TINCTURA. 



Of less importance, or superfluous, are the official Extracts of Cimicifuga, Col- 

 chicum Corm, Ergot, Gelsemium, Gentian, Glycyrrhiza, Hyoscyamus, Malt, Physos- 

 tigma, Stramonium, Sumbul, Taraxacum, and Viburnum Prunifolium. 



TINCTURA. 



Tinctures are alcoholic preparations made by extraction of the important medic- 

 inal principles of vegetable drugs. Two exceptions are the Tincture of Iodine and 

 Eerric Chloride, which are alcoholic solutions of chemical substances. 



Of the more potent drugs, the strengthof the Tincture is such that 100 mils of the 

 finished product represents 10 Gm. of 'the drug. The majority of Tinctures are pre- 

 pared by percolation, a few by maceration, and a few others require special methods. 

 All Tinctures should be kept in tightly stoppered bottles, free from light, and in a cool 

 place. 



Prepare the official Tinctura Opii Camphorata by "Type Process M" (macera- 

 tion) : Make a menstruum of 5 mils glycerin mixed with 120 mils dilute alcohol; in 

 this place 0.5 Gm. each of powdered opium, benzoic acid, and camphor, and 0.5 mil oil 

 of anise. Set it in a moderately warm place, allowing maceration to proceed for 3 days, 

 occasionally agitating the mixture. Transfer to a filter, collect the filtrate, and wash 

 the residue with dilute alcohol to make the total product equal 125 mils. 

 Note : Appearance Odor 



Color 



Taste .. 



(Instead of the above the Compound Tincture of Lavender may be used for 

 study). 



