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OF

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.

SECTION A. MATHEMATICS, PHYSICS AND CHEMISTRY.

Address of ASAPH HALL, Vice President

.

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