A series of five "open nights" on the general topic of astronomy will be held at the Harvard College Observatory during the month of October. Lectures will be given on each of the nights by various speakers under the auspices of the Bond Astronomical Club.

All of these talks will begin at 7.45 o'clock. The first one, which comes on October 10, will be given by Dr. W. J. Fisher, who will speak on "The Full Moon and the Eclipsed Moon". On October 13, Dr. C. H. Payne will lecture on the subject of "Winter Constellations."

"The Planets" is the subject of L. H. Campbell, who will lecture on October 18. Dr. A. J. Cannon will give a speech on the topic of "New Stars" on October 24. The final lecture of the series will be given on October 27 by Professor S. J. Bailey, who will talk on the subject of "Star Clouds and Nebulae".

No Charge for Tickets

The program each evening will consist of a short, non-technical talk, followed, when weather permits, by telescopic observations of celestial subjects. Exhibits, illustrating the work of the Observatory, will be shown by members of the club.

Tickets to these "opennights", for which there is no charge, must be obtained in advance by sending a self-addressed, stamped envelope to "Open Nights", Harvard College Observatory, Cambridge. Applicants must state for which night the tickets are desired, as the tickets will be assigned for one night only.