which sounds like something from the DMG, but is really;

"According to a late 19th century medical publication, one could re-create Ham’s Oil of Gladness at home with oil of cedar, hemlock, sassafras, thyme, camphor powder and linseed oil. According to the recipe, the oils and camphor were to be dissolved in alcohol and added to the linseed oil. Eight to 10 drops of this solution was a dose for a child. (The Medical World, 1887, Volume 5, page 429."

the name is a biblical reference, of course, as one might expect from the late 1800s.