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 Fausto d'Elhuyar, which I deposited in different cabinets of Europe, and of which M. M. Vauquelin and Klaproth published an analysis. This mass of Durango is affirmed to weigh upwards of 1900 miriagrammes, which is 400 more than the aerolithos discovered at Olumpa in the Tucuman, by M. Rubin de Celis. A distinguished mineralogist, M. Frederick Sonnenschmidt, who travelled over much more of Mexico than myself, discovered also in 1792, in the interior of the town of Zacatecas, a mass of malleable iron of the weight of 977 myriagrammes, which in its exterior and physical character was found by him entirely analogous with the malleable iron described by the celebrated Pallas."

Political Essay. Black's translation, Vol. 2, p. 292.

Humboldt's account reduces the size of the Mexican sky-stone something more than half; still it remains greatly larger than any other which has been yet discovered.