Richard B. Olson '63 has been elected chairman of the Harvard students for Ledge. The 40 members, who will work for the election of George Cabot Ledge '50 to the U.S. Senate, are new writing letters to home-town Republican committeeman in preparation for the Worcester convention. Other officers: John L. Powers '65, vice-chairman; Paul S. Horvitz '64, secretary-treasurer; and Thomas B. Williams '63, member-at-large.