The office of the ambulatory clinicians of the veterinary clinic at Iowa State College received a call on Jan. 21, 1950, from the college swine herdsman concerning the castration of five mature herd boars. The following equipment was prepared:1. Large, flat, stainless steel pan 2. Bard-Parker handle and hooked blades 3. Emasculator 4. Hard twist manila rope, 1/2 in. x 12 ft. 5. Large turkish towel 6. Chloroform, three 1/4 lb. bottle