PR EPA RA TIONS. 1 1 



Camphorae is a solution without distillation. Aqua] 

 Chloroformi is the only aqua not made from an oil. 



Cataplasmata, Poultices, are familiar external 

 applications. They generally contain linseed meal aa 

 their basis. 



Chartae, Papers, consist of cartridge paper coated 

 with an active compound much like a plaster. 



Confectiones, Confections, conserves, or electuaries, 

 are soft pasty-looking preparations, in which drugs, 

 generally dry, are" incorporated with syrup, sugar, or 

 honey. 



Decocta, Decoctions, are made by boiling vegetablej 

 substances in water from five to twenty minutes. All* 

 decoctions are simple, except that of aloes and one 

 of the decoctions of sarsa. 



Emplastra, Plasters, are external applications 

 which adhere when applied to the body, and produce 

 either a local or a general effect. The basis in all is a 

 compound of fatty substances (resin, wax, lead, soap, 

 etc.), and is intended to be spread on linen, leather, or 

 other material. 



Enema ta, Enemas, injections, clysters, are liquid 

 preparations for injection per rectum. The basis is 

 generally mucilage of starch or water. 



Essentiae, Essences, are solutions of volatile oils in 

 four parts of rectified spirit, i.e. are ten times the 

 strength of the ordinary spirits. 



Extracta, Extracts, are preparations obtained by 

 evaporating either the expressed juice of fresh plants, 

 or the soluble parts of dried drugs. They are, there- 

 fore, of several kinds : 



1. Green extracts. The juice pressed from the 

 bruised plant is heated to 130, to coagulate the green 

 colouring matter, which is strained off and reserved. 

 The fluid is next heated to 200, to coagulate the albu- 

 men, which is separated by filtration and rejected. The 

 filtrate is now evaporated at H0 to a syrup, the green 



