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DOUBLEDAY, PAGE & COMPANY

ALL RIGHTS RESERVED, INCLUDING THAT OF TRANSLATION
INTO FOREIGN LANGUAGES, INCLUDING THE SCANDINAVIAN

то

M. J. D.

WHOSE UNCEASING ATTENTION TO THE DETAILS OF DAILY LIFE AND WHOSE MANIFOLD PERSONAL SACRIFICES HAVE ADDED SO MANY HOURS TO THE SUM OF THE TIME I HAVE BEEN ABLE TO DEVOTE TO INVESTIGATION AND STUDY, THIS BOOK IS AFFECTIONATELY DEDICATED