Shell, remove skins, and finely chop peanuts. Sprinkle with one-fourth teaspoon salt. Put sugar in a perfectly smooth granite saucepan, place on range, and stir constantly until melted to a syrup, taking care to keep sugar from sides of pan. Add nut meat, pour at once into a warm buttered tin, and mark in small squares. If sugar is not removed from range as soon as melted, it will quickly caramelize.