Mix an ounce of oil of peppermint with a pint of alcohol. Then colour it by putting in some leaves of green mint. Let it stand till the colour is a fine green; then filter it through blotting paper. Drop it on sugar when you take it.
Essence of pennyroyal, mint, cinnamon, cloves, etc. may all be prepared in the same manner by mixing a portion of the essential oil with a little alcohol.
You may obtain liquid camphor by breaking up and dissolving a lump in white brandy or spirit of wine.