The secret of it all was, that while his scientific ideals were an integral part of his being, something that he never forgot or laid aside, so that wherever he went he came forward as "the Professor," and talked "shop" to every person, young or old, great or little, learned or unlearned, with whom he was thrown, he was at the same time so commanding a presence, so curious and inquiring, so responsive and expansive, and so generous and reckless of himself and of his own, that every one said immediately, "Here is no musty savant, but a man, a great man, a man on the heroic scale, not to serve whom is avarice and sin." He elevated the popular notion of what a student of Nature could be. Since Benjamin Franklin, we had never had among us a person of more popularly impressive type. He did not wait for students to come to him; he made inquiry for promising youthful collectors, and when he heard of one, he wrote, inviting and urging him to come. Thus there is hardly one now of the American naturalists of my generation whom Agassiz did not train. Nay, more; he said to every one that a year or two of natural history, studied as he understood it, would give the best training for any kind of mental work. Sometimes he was amusingly _naif_ in this regard, as when he offered to put his whole Museum at the disposition of the Emperor of Brazil if he would but come and labor there. And I well remember how certain officials of the Brazilian empire smiled at the cordiality with which he pressed upon them a similar invitation. But it had a great effect. Natural history must indeed be a godlike pursuit, if such a man as this can so adore it, people said; and the very definition and meaning of the word naturalist underwent a favorable alteration in the common mind. Certain sayings of Agassiz's, as the famous one that he "had no time for making money," and his habit of naming his occupation simply as that of "teacher," have caught the public fancy, and are permanent benefactions. We all enjoy more consideration for the fact that he manifested himself here thus before us in his day.