rules and constructions into our brains, or we have a lesson in anatomy, or I read general natural history aloud to William Schimper. By and by I shall review the natural history of grasses and ferns, two families of which I made a special study last summer. Twice a week Karl Schimper lectures to us on the morphology of plants; a very interesting course on a subject but little known. He has twelve listeners. Agassiz is also to give us lectures occasionally on Sundays upon the natural history of fishes. You see there is enough to do. . . Somewhat before this, early in 1828, Agassiz had made the acquaintance of Mr. Joseph Dinkel, an artist. A day spent together in the country, in order that Mr. Dinkel might draw a brilliantly colored trout from life, under the immediate direction of the young naturalist, led to a relation which continued uninterruptedly for many years. Mr. Dinkel afterward accompanied Agassiz, as his artist, on repeated journeys, being constantly employed in making illustrations for the "Poissons Fossiles" and the "Poissons d'Eau Douce," as well as for his monographs and smaller papers. The two larger works, the latter of which remained unfinished, were even now in embryo. Not only was Mr. Dinkel at work upon the plates for the Fresh-Water Fishes, but Mr. J.C. Weber, who was then engaged in making, under Agassiz's direction, the illustrations for the Spix Fishes, was also giving his spare hours to the same objects. Mr. Dinkel says of Agassiz's student life at this time:--* (* Extract from notes written out in English by Mr. Dinkel after the death of Agassiz and sent to me. The English, though a little foreign, is so expressive that it would lose by any attempt to change it, and the writer will excuse me for inserting his vivid sketch just as it stands.--E.C.A.)