PROFESSORS B. SILLIMAN AND JAMES D. DANA,
PROFESSORS ASA GRAY, AND WOLCOTT GIBBS,
OF CAMBRIDGE,
PROFESSORS S. W. JOHNSON, GEO. J. BRUSH, AND
H. A. NEWTON, or NEW HAVEN.
VOL. XLII.-[WHOLE NUMBER, XCII.]
JULY, SEPTEMBER, NOVEMBER.
PRINTED BY E. HAYES, 426 CHAPEL ST.