Eminent and versatile Swiss-born American zoologist and geologist (1807-1873) who carried out much of his research as a longtime faculty member at Harvard, where he was also instrumental in building the university’s enviable natural history collection. ALS in French, signed “L. Agassiz,” one page, 8.5 x 10.5, no date. Handwritten letter from the "Glacier de l'Aar" in the Bernese Alps, where he built a hut—the 'Hôtel des Neuchâtelois'—to conduct his scientific observations of the glacier. He acknowledges with gratitude some of the very nice visitors he received there. In very good to fine condition, with scattered light foxing, and wear and staining to the right edge. In 1847, Agassiz published his Système glaciaire, in which he thoroughly discussed the chief phenomena of glaciers.
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