Cold Cream.
The Unguentum Refrigerans, also called “Ceratum,” appeared in the first P.L., the formula being attributed to Galen. Four ounces of white wax were melted in 1 lb. of rose oil (ol. rosarum omphacinum, that is, olive oil in which rose buds 4 oz. to the lb. had been macerated, the maceration being carried out three times, each time with a fresh lot of roses). The melted oil and wax were to be poured frequently from one vessel to another, stirring in a little cold water meanwhile, until the mixture became white. Lastly, it was to be washed with rose water, and a little rose water and rose vinegar were to be added.