JAMES D. DANA, B. SILLIMAN, AND E. S. 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,
PROFESSOR EDWARD C. PICKERING, of Boston.
VOL. XI.-[WHOLE NUMBER, CXI.]