HARPER'S WEEKLY, New York, January 10, 1903  Frontpage photo Americans of To-Morrow, XXII.- Arthur Twining Hadley; fullpage illustration "The Military Heads of New York's Police Force"; Recent Light on the Rontgen Rays; Excavating Prehistoric Animals of North America; doublepage centerfold "The Twentieth-Century Problem of Municipalities"; types of Entries for the Gordon-Bennett Race (automobile); and other news and advertisements of the day. See photos for full details.