34 



Filtration 



Aqua Anisi — Anise 



' ' Camphorae — Camphor 



' ' Cinnamoini — Cinnamon 



' ' Foeniculi — Fennel 



" Menthae Piperitae — Peppermint 



' ' Menthae Viridis — Spearmint 



Distillation 



Aqua Aurantii Florum Fortior — Stronger Eose Water. 

 ' ' Destillata— Distilled Water 

 " Destillata Sterilisata — Sterile distilled water 

 ' ' Hamamelidis — Witchhazel 

 ' ' Rosae Fortior — Stronger Rose Water. 



Gaseous Solution 



Aqua Ammoniae — Ammonia Water 



" Ammoniae Fortior — Stronger Ammonia Water. 



The process of simple dilution or solution consists of adding 

 the drug to a sufficient amount of water and agitating. In case of 

 a gaseous solution, the gas must first be generated in a suitable ap- 

 paratus, washed and passed into a cylinder containing water. 



Filtration through an absorbent powder. Excepting in the 

 case of camphor water, this process is employed to obtain a satu- 

 rated solution of volatile oil. Since these oils are but slightly solu- 

 ble in water, they are triturated with an insoluble absorbent powdei 

 to separate them into finely divided form. After trituration with the 

 powder, the water is gradually added. The result is that the finely 

 divided drug is better brought into solution. Several powders have 

 been recommended for use but all were more or less soluble and the 

 Pharmacopoeia specifies purified talcum. This is the method speci- 

 fied in the general formula for aromatic waters. 



Distillation : In this case the product is put into a still with 

 water and heat applied. The vapors arising from the still carry 

 with them the volatile aromatic principles of the plant. 



Waters are usually employed as pleasant vehicles for solution 

 of various salts. 



