In pharmacy, water is used principally as a sol- 

 vent. 



BALSAMS 



Are resinous substances which contain Benzoic, 

 Cinnamic or an analogous acid. 



How many officinal ones are there? Two. 

 Name them. 

 Balsamum Tolutanum. 

 Balsomum Peruvianum. 



CERAT A Cerates. 



Are unctious substances of such consistency that 

 they may be easily spread with a spatula. 



How many officinal ones are there? Eight. 



What substances are used for bases? Oil, lard, 

 petrolatum. Wax, and sometimes paraffin or sper- 

 maceti, in the presence of wax, are used to raise the 

 melting point of the bases. 



Name two modes of preparation. 



By Fusion. 



By Incorporation, 



Name two by each process. 



By Fusion Ceratum Cantharidis. 



By Fusion Ceratum Cetacei. 



By Incorporation Ceratum Camphorae. 



By Incorporation Ceratum Plumbi Subacetatis. 



Give formulae for Ceratum. 



White Wax 30 parts. 



Lard 70 parts. 



Why is Ceratum so named? 



From "Cera," meaning wax. 



Give the ingredients of Ceratum Plumbi Subace- 

 tatis (Goulard's Cerate). 



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