PROMINENT ASTRONOMERS COME TO LECTURE AT OBSERVATORY

Two prominent astronomers of the day have arrived in Cambridge to spend the next few weeks at the Harvard Observatory, where they will give lectures and also confer with the Harvard astronomers on some of the major problems confronting the leaders of this field today.

The first of these visiting scientists is Dr. J. S. Plaskett, director of the Dominion Observatory at Victoria, B. C. On April 9 Plaskett received the Rumford Prize of the American Academy of Arts and Sciences in Boston, at which time he addressed the Academy on the subject of the Gases in Interstellar space. Dr. Plaskett has also been awarded the Gold Medal of the Royal As tronomical Society for his researches in the rolation of the Galaxy. His son is Professor H. H. Plaskett of the Harvard Observatory staff. Dr. Paul ten Bruggencate, professor of Astrophysics in the University of Greifawald, Germany, is the second visiting astronomer. He will conduct a series of lectures on Stellar Systems.