“…Increased gains have resulted when cottonseed meal-containing rations have been supplemented with vitamin Biz (Blaylock and Richardson, 1950;Sherwood and Couch, 1950;Patrick, 1953), antibiotics such as penicillin and aureomycin (Patrick, 1953) or combinations of antibiotics and vitamin Biz (Lewis and Sanford, 1953 ;Machlin et al, 1952). On the other hand, Machlin et al.…”