OPENING OBSERVATORY LECTURE GIVEN TODAY

"Tides of the Ocean and the Air" will be the title of the first astronomy lecture, being given this evening at 8 o'clock by Dr. H. T. Stetson, in the Harvard Observatory. This lecture, the first of a series of five, will be followed by four other lectures, on February 8, 9, 11, and 12.

Dr. Loring B. Andrews '25 will give the second lecture, "The Moon and the Stars in Navigation," on Friday, and this will be followed by another lecture by Dr. Stetson, who speaks Saturday of this week on "The Earth, Radio, and the Moon." "Metoors and Meteor Craters on Earth and Moon," by Fletcher Watson, assistant in Astronomy, is scheduled for Monday, February 11, and Dr. Carol A. Rieke will deliver the last, "Theories of the Origins of the Earth and Moon" on Tuesday, February 12.

This special series will be held in the lecture hall of Building D of the Observatory, and if the weather permits, opportunity will be given for telescopic observation of the moon and stars. Exhibits showing the work of the Observatory will be explained by members of the staff. Tickets of admission, for one night only, may be obtained in advance by sending a self addressed envelope to the Dowse Institute Lectures, in care of the Observatory.