While yet a young man he was a contributor to some of the ablest mathematical periodicals of the country. Even now, when more than eighty years of age, he is often found engaged in mathematical investigations, as a mere pastime. This natural capacity ibr and pleasure in this science, connected with a peculiar facility in simplifying to young minds its rules and processes, enabled the professor to awaken in his school that fondness for mathematical studies, and secure that unusual advancement in them, which was one of the marked results of his teaching.

With the literature of ancient Greece and Rome he has rare familiarity. Many of the most elegant of the classic authors of antiquity in their original languages are to him as hand-books, and his translations of a number of them into our vernacular tongue are among the permanent and most valuable fruits of his scholarly labors. He is now just finishing a translation of the works of Horace, which, in fidelity to the original text, and in perspicuity and elegance of expression, will, in the opinion of classical scholars who have had the privilege of examining his work, be superior to any we now have. It is earnestly desired that he will give these translations to the world through the press, and that his health and strength will be continued, that he may personally superintend their publication.

Among the sciences to which he has succes^sfully given his attention is mineralogy, and through more than half a century he has been engaged in collecting