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Barnell to Speak on Radioactivity

Members of the University are invited to attend the meeting of the Boston Society of Natural History in Boston at 8 o'clock tonight. Professor Joseph Barnell, of Yale University will speak on "The Age of the Earth as based on recent Developments in Radio-activity." The lecture will be illustrated by lantern slides.

Professor Barnell has made a special study of the geological aspects of radio-activity and will present it in a nontechnical way, giving his conclusions on this new and interesting subject.

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