AMMONIA c UM. 255 



volatile oil, 20 per cent, of gum, and 70 per cent, of resin. The 

 oil does not contain sulphur. 

 Dose. 10 to 20 gr. 



Preparations. 



1 . Emplastrum Amtnoniaci cutn HvdraTfirvro. About 1 in 14-. 



(Sae Hydrargyrum, page 86.) 



2. Mistura Ammoniac!. A milk-like emulsion. 1 in 32 water. 



Dose, ^ to 1 fl.oz. 



Ammoniacum is also an ingredient of Emplastrum Galbani, 

 1 in 1 1 ; Pilula Ipecacuanha cum Scilla, 1 in 7 ; and 

 Piiula Scillae Composita, 1 in 6. 



ACTION AND USES. 



The action of ammoniacum closely resembles that of the 

 other aromatics and oleo-resins, "but it is used almost solely for 

 its remote local effects. In being excreted by the bronchial 

 mucosa, it stimulates the surface and disinfects the secretions of 

 the part (see Terebinthina Oleum, page 343) ; and it probably 

 acts similarly on the skin. It is used as a disinfectant ex- 

 pectorant in chronic bronchitis with profuse discharge, and as 

 a constituent of plasters intended to strengthen circulation in 

 the skin and promote absorption. 



Oleum Anisi OIL OF ANISE. The oil distilled 

 in Europe from the fruit of Pimpinella Anisum. 

 Also the oil distilled in China from the fruit of 

 Illiciuin anisatum, Star Anise (Magnoliacese.) 



Characters of the fruit. Half fruits with five filiform 

 equal ridges, the lateral ones being marginal. In each channel 

 are three or more vittae. Thicker and more ovate than caraway 

 fruits. 



Characters of the oil. Colourless or pale yellow, with the 

 familiar odour of anise, and a warm sweetish taste. Concretes 

 at 60 C . 



Composition. Oil of aniseed, anethol, or anise-camphor, is 

 composed of two isomeric bodies, the fluid (), and the solid 

 (|), anethol. 



Dose. 2 to 5 min. 



Preparation. 



Essentia Anisi. 1 in 5. Dose, 10 to 20 min. 



Oil of Anise is also contained in Tinctura Camphor Com- 

 posita, and Tinctura Opii Ammoniata. 



