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THE AMERICAN ASSOCIATION

FOR THE

ADVANCEMENT OF SCIENCE,

TWENTY-NINTH MEETING,

HELD AT

Boston, Mass.,

AUGUST, 1880.

SALEM :

PUBLISHED BY THE PERMANENT SECRETARY.

EDITED BY

FREDERICK W. PUTNAM,

Permanent Secretary.

PRINTED AT

THE SALEM PRESS,

SALEM, MASS.

TABLE OF CONTENTS.

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