SIR JAMES JEANS SPEAKS TONIGHT BEFORE SIGMA XI

Lecturing tonight on the "Annihilation of Matter" at Sanders Theater, Sir James Jeans, former president of the Royal Astronomical Society, will be the first speaker to address the public under the auspices of the recently founded Harvard Chapter of the national Sigma Xi Society. The talk, which will begin at 8.15 o'clock, has been made possible through the courtesy of the Franklin Institute, of Philadelphia.

Tickets for the lecture tonight were supplied free of charge to those applying to K. F. Mather, professor of Geology, and secretary of the organization, but last night it was announced through Professor Mather's office that more than 300 applications had to be refused on account of the limited accommodations of the building. Seats have been reserved for the public on the stage, in the orchestra, and in the first and second balconies of the theater, while the small gallery above the stage has been left vacant. If necessary, however, this additional space will also be opened to the public, making a considerable addition to the size of the audience. Those whose original applications have been refused have been requested to investigate the possibilities of admission to this gallery.

Prominent as Mathematician

Sir James, prominent as a mathematician as well as an astronomer, has been elected the Medalist of the Franklin Institute for the present year. "The Mysterious Universe," "The Universe Around. Us," and "The Stars in Their Courses" are the best known of the books which the eminent scientist has written on the field which he is to treat in his lecture tonight. From 1919 to 1928, he was the secretary of the Royal Society, and has been since 1923 Research Associate of the Mount Wilson Observatory, of which he has been the guest during the first part of the present year.