One Thousand Ways to Make Money by Page Fox

113. ARTIFICIAL SLATES.--Take forty-one parts of sand, four parts of

lampblack, four parts of boiled linseed or cottonseed oil. Boil thoroughly, and reduce the mixture by adding spirits of turpentine so that it may be easily applied to a thin piece of pasteboard. Give three coats, drying between each coat. Finish by rubbing smooth with a piece of cotton waste soaked in spirits of turpentine. You have an excellent slate or memorandum book, which may be sold for ten cents. Use a slate pencil. Made in large quantities, these are very profitable.