74 



Troehisci Acidi Tannici Troches Tannic Acid 



" Ammonii Chloridi " Ammonium Chloride 

 " Cubebae " Cubebs 



' ' Potassii Chloratis ' ' Potassium Chlorate 

 " Sodii Bicarbonatis " Sodium Bicarbonate 



Trochisci Potassii Chloratis 



Potassium Chlorate, in fine powder 

 Sugar, in fine powder 

 Tragaeanth, in fine powder 

 Water, a sufficient quality 



to make 



Mix the sugar with the tragaeanth by trituration in a mortar ; 

 then transfer the mixture to a sheet of paper, and by means of a 

 bone or wooden spatula mix it with the potassium chlorate, being 

 careful to avoid unnecessary trituration or pressure which might 

 cause the mixture to ignite or explode. Lastly with water, form a 

 mass, to be divided into ten (10) troches. 



UNGUENTA— OINTMENTS 



Ointments are semisolid preparations in which the medical sub- 

 stances are blended with fatty substances, lard, petrolatum, etc., 

 and soft enough to be applied to the skin by inunction. They are 

 always softer than cerates, which see. They may be prepared by 

 incorporation or fusion. When made by the former method, the 

 medical substance is rubbed with the solid fatty matter in a mortar 

 or upon an ointment slab with a spatula. When made by fu- 

 sion the fatty base is liquified by gentle heat and the medicine in- 

 corporated while liquid or after solidification. Twenty are official. 



Unguentum, A base for other ointments 



Unguentum Acidi Boriei 

 " Acidi Tannici 



' ' Aquae Rosae 



' ' Belladonnae 



" Chrysarobini (Chrysarobin) 



' ' Diachylon 



