ed his preference for Chemistry and Mineralogy. He became an
active member of the Boston Linnaean Society, and the first paper read
before it, entitled "An Analysis of the Incrustation formed upon the
Basket of Eggs from Derbyshire, England" (presented by Judge Davis),
was read by him. In the spring of 1813, the Corporation of Harvard
College employed Mr. Dana to visit England in order to procure
suitable apparatus for its chemical department. During his stay abroad
he studied, for a time, under the instruction of the somewhat
distinguished Frederic Accum. In consequence of this absence he did
not receive his degree of M.D. till 1817, that of A. M. having been
previously conferred.

In the autumn of 1817, Dr. Dana was appointed to deliver a course of
chemical lectures to the medical students of Dartmouth College. The
professors in the Medical School were Dr. R. D. Mussey and Dr. Cyrus
Perkins. These lectures were so satisfactory that the appointment was
continued, and during the autumns of 1818, 1819, and 1820, he lectured
at Dartmouth, residing during the intervals at Cambridge, where, in
January, 1818, he was united in marriage with Matilda, third daughter
of Samuel Webber, D.D., late president of Harvard College.

In 1821, being appointed professor at Dartmouth, Dr. Dana removed to
Hanover, where, relinquishing the practice of medicine, he devoted his
whole attention to his favorite studies, to which was now added
Botany, upon which he delivered some courses of lectures.

Dr. Perkins, the Professor of Materia Medica, removed to New York
after the dissolution of the "University of New Hampshire," and the
late admired and lamented Dr. Daniel Oliver, of Salem, was appointed
to the professorship. Dr. Mussey, celebrated for his surgical
knowledge and skill, remained as the head of the Medical School, and
among these gentlemen, differing widely as they did in many
characteristics, the warmest friendship subsisted. During the
intervals of leisure from strictly professional duties, Dr. Dana
occupied himself in continuing to write for "Silliman's Journal," and
in frequent excursions to various parts of New Hampshire, for the
purpose of analyzing the ores and waters of mines and springs. His
published analysis of the waters of a spring in Burton, N. H., was
considered so scientific a production, that he was written to as to
accepting a professorship in the University of Virginia. Not wishing
the appointment, he declined bec