Twelve good quality Hereford steer calves were used in this study. They were divided into two lots of six steers each. Both lots were treated similarly throughout the experiment except that one lot was allowed free access to salt and the other was not. The calves were started on test December 18, 1948, wintered on dry grass, used in spring digestion trial, grazed, then full fed in dry lot, and marketed on December 2, 1949.