Balsam of Peru may be emulsified with yolk of egg or with powdered acacia, as in the following :

Rub up the balsam with 4 drachms of powdered acacia, exactly as is done in the case of fixed oils, and use from 5 to 6 ounces of water for dilution. Separately rub together the acid and acetate with the morphine solution and the rest of the water. Mix the two.