In a survey of the marginal zone now approaching completion at the U.S. Naval Observatory about 700 photographs of the Moon, made on 503 nights, have been utilized. These photographs, made at the Naval Observatory, the Yale-Columbia Southern Station at Johannesburg, and the Lowell Observatory, were measured by an automatic photoelectric device. The measures were recorded graphically in the form of profiles, which are on a scale of 41 mm per degree in position angle and 16 mm per second of arc in radius.