This section of the book is from "The Complete Herbalist" by Dr. O. Phelps Brown. Also available from Amazon: The Complete Herbalist: The People Their Own Physicians By The Use Of Nature's Remedies.
This file is the only practical cure for corns. It should always be used instead of a knife. With a little care the corn can be filed down to a perfectly smooth, level surface, which result can never be attained by the use of the knife. After the corn is filed down smoothly and evenly in every part, My Herbal Ointment should be applied night and morning. The price of the ointment is 25 cents per pot, and two cents extra for postage. It is sold by druggists generally. The price of the Corn File, prepaid by mail, is 50 cents. No one afflicted with a corn will ever regret the small sum of money it costs.