J. Harmond, Popular Science Monthly (1881)
“ The nuts, when broken up with their coverings, yield about thirty-six per cent, of oil; cleared of their coverings, the kernels give sixty per cent. When cold-pressed, the oil is clear and amber-colored. When left to stand, it gives a solid deposit of a crystalline appearance. It makes a soap of excellent quality, and having a certain degree of hardness—a property which makes it valuable to mix with other oils that give too soft soaps. When refined, it makes an excellent lubricating oil, and gives a light that leaves nothing to be desired. ”
