Astronomical Colloquium

Two prominent authorities will speak at the Astronomical Colloquium to be held tomorrow afternoon at 2 o'clock in Building A of the Harvard College Observatory. Dr. P. ten Bruggencate of Gottingen will give an address entitled "On the Nature of Cepheld Variation," while Professor H. H. Plaskett of the University will speak on "Russell on the Composition of the Solar Atmosphere." The meeting is open to all members of the University.