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 and California; and they explored this group in company, Mr. Mann
 taking the Botany as his particular department, while Mr. Brigham
 attended more to the Geology and Mineralogy. On his return to
 Cambridge he took up the special study of Hawaiian plants, and rejoined
 the Scientific School of Harvard University. Upon applying
 for the degree of Bachelor of Science (which he obtained with honors
 in 1867), he laid before his examiners, as his thesis, an elaborate and
 critical “Enumeration of Hawaiian Plants,” which was deemed worthy
 of a place among the publications of this Academy. It fills almost
 one hundred pages of the seventh volume of our Proceedings, and has
 been recognized in the botanical world as a contribution of sterling
 value. It had been preceded by two other papers in the Proceedings
 of the Boston Society of Natural History upon certain new plants of
 the Sandwich Islands, and it was to be followed by a complete Flora
 of those Islands for the use of general botanists on the one hand, and
 of the residents of the country on the other, such a work being a desideratum
 for both. Mr. Mann had actually written out the greater
 part of it, and three fasciculi were printed by the Essex Institute; it is
 hoped that the work may be completed from the notes and materials
 left by him. The smaller papers and articles contributed by Mr. Mann
 to the Boston Natural History Society and to scientific journals are at
 least twelve in number. All his writings, in their simplicity, directness,
 order, and the total absence of pretence and show, may recall to those
 who knew him well somewhat of the traits of the man, — his great
 modesty, singleness and tenacity of purpose, and disinterested devotion
 to science for its own sake. Looking back over the very few years
 which were allotted to him, we wonder at the amount of work he was
 able to accomplish, as represented in these publications. They are the
 fruits, apparently not so much of youthful enthusiasm, which was
 not lacking, as of conscientious, unremitting, and well-directed labor.
 Moreover, they were brought forth under delicate health, and, at
 length, under the ravages of an insidious disease, and amid other onerous

        