Charles William Burkett, The Farmer's Veterinarian: A Practical Treatise on the Diseases of Farm Stock
“ There is no direct vermifuge that will as effectually kill all species of worms in a sheep’s stomach and intestines as will gasoline; yet the coal tar creosote or the more refined class of sheep dips, if given after a full 12-hour fast, before the flock is turned to pasture in the spring, and again about November, will destroy a large number of the mature worms. ”
