THE

AMERICAN JOURNAL

OF

SCIENCE AND ARTS.

CONDUCTED BY

PROFESSORS B. SILLIMAN AND B. SILLIMAN, JR.,

AND

JAMES D. DANA.

SECOND SERIES.

VOL. III.-MAY, 1847.

NEW HAVEN:

PRINTED FOR THE EDITORS BY B. L. HAMLEN,

Printer to Yale College.

Sold by H. DAY, New Haven.-LITTLE & BROWN, and W. H. S. JORDAN, Boston.-C. S.
FRANCIS & Co. and WILEY & PUTNAM, New York.-CAREY & HART, Philadelphia.-
N. HICKMAN, Baltimore, Md.-WILEY & PUTNAM, London.-HECTOR BOSSANGE & CO.,
Paris.-NESTLER & MELLE, Hamburgh.