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COPYRIGHT, 1911, BY
D. APPLETON AND COMPANY

Published October, 1911

Printed in the United States of America

THIS VOLUME IS RESPECTFULLY DEDICATED TO THE INSTRUCTORS AND STUDENTS OF THE

UNIVERSITY OF PENNSYLVANIA AND TO NUMER

OUS CITIZENS OF PHILADELPHIA, WHO GAVE

GENEROUS ATTENDANCE AND RECOGNITION TO

THE LECTURES UPON WHICH IT IS BASED

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