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THE

AMERICAN JOURNAL

OF

SCIENCE AND ARTS.

CONDUCTED BY

PROFESSORS B. SILLIMAN AND JAMES D. DANA,

IN CONNECTION WITH

PROFESSORS ASA GRAY, AND WOLCOTT GIBBS,

OF CAMBRIDGE,

AND

PROFESSORS H. A. NEWTON, S. W. JOHNSON,
GEO. J. BRUSH, AND A. E. VERRILL,

OF NEW HAVEN.

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VOL. XLVIII. – [WHOLE NUMBER, XCVIII.]

Nos. 142, 143, 144.

NEW 'H A VEN: EDITORS.

1869.

PRINTED BY TUTTLE, MOREHOUSE & TAYLOR, 221 STATE ST.

st

253557

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