PROFESSORS B. SILLIMAN AND JAMES D. DANA,
PROFESSORS ASA GRAY, AND WOLCOTT GIBBS,
OF CAMBRIDGE,
PROFESSORS H. A. NEWTON, S. W. JOHNSON,
GEO. J. BRUSH, AND A. E. VERRILL,
OF NEW HAVEN.
VOL. XLVII.-[WHOLE NUMBER, XCVII.]
Nos. 139, 140, 141.
JANUARY, MARCH, MAY.
PRINTED BY TUTTLE, MOREHOUSE & TAYLOR, 221 STATE ST.