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SCIENCE 



A WEEKLY JOURNAL DEVOTED TO THE ADVANCEMENT OF SCIENCE, PUBLISH. 



INQ THE OFFICIAL NOTICES AND PROCEEDINGS OF THE AMERICAN 



ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE. 



NEW SERIES. VOLUME XXXI 



JANUARY-JUNE, 1910 



NEW YORK 



THE SCIENCE PRESS 



1910 



-^i^i&q 



