Oil of Heliotrope.
This oil which does not yet occur in commerce (we find merely the pomade and the alcoholic extract of the latter) has been made by the author experimentally; the most suitable method was found to be extraction with petroleum ether. As the plant, Heliotropium peruvianum, the source of this delightful odor, is frequently cultivated in our gardens, the preparation of the oil by this method is to be recommended, being less expensive and more rapid than by the use of fat, while the product obtained with petroleum ether is as fine as that extracted by alcohol from the pomade.