EXTRACTS 35 



tinctures except for the solvent used. Acetic Acid is a good sol- 

 vent for many of the active ingredients of plants and serves as a 

 preservative. It also produces soluble salts with the alkaloidal prin- 

 ciples of plants. But one is official : 



Acetum SciUse, Vinegar of Squill 



This is prepared with Diluted Acetic Acid (6 per cent, by weight 

 of absolute Acetic Acid), and is made by maceration. It represents 

 10 per cent, of the active drug. 



EXTRACTA — EXTRACTS 



Extracts are solid or semi-solid preparations of the active con- 

 stituents of drugs prepared by percolation of the crude drug with 

 the proper naenstruum and evaporation of the percolate. The men- 

 struum may be water, alcohol, or various proportions of water and 

 alcohol, or ammonia, and extracts made from such a percolate are 

 termed respectively, aqueous, alcoholic, hydro-alcoholic, or ammon- 

 iated extracts. Besides the above the juices of fresh plants, extracted 

 by contusion and expression, are often evaporated and known as 

 " inspissated juices." These are popular in England but none are 

 official in this country. There are 25 official extracts. As a rule the 

 extracts are not so satisfactory as the fluidextracts or tinctures 

 because they vary in strength, the dose is exceedingly small and the 

 soft ones are difficult to manipulate. 



Table of Extracts 



Extractum Aconiti Powdered 

 Extractum Belladonnse Eoliorium Powdered and Pilular 



Extractum Cannabis Pilular 



Extractum Cascarse Powdered 



Extractum Cimieifugse Powdered 



Extractjim Colchici Cormi Powdered 



Extractum Colocynthrdis Powdered 

 Extractum Colocynthidis Com- Powdered 



positum 



Extractum Ergots3 Pilular 



Extractum Fellis Bovis Powdered 



Extractum Gelsemii Powdered 



Extractum Gentianse Pilular 



Extractum Glyeyrrhiza? Brittle 

 Extractum Glycyrrhizae Purum Pilular 



Extractum Hydrastis Powdered 



Extractum Hyoscyami Pilular 



Extractum Malti Thin Liquid 



Extractum Nucis Vomicae Powdered 



Extractum Opii Powdered 



