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Other letters have been received on this subject from Colonel Greenwood and F. G. S., but want of space precludes their publication till next month.
page 48 note 1 Cam. Phil. Trans., vol. xi., part iii.; and Geol. Mag., Vol. V., p. 493, and Vol. VI., p. 45.
page 48 note 2 Nearly every stone meteorite preserves its true external dark vitrified coat; but meteoric iron corrodes and rusts so rapidly on its exterior, that the original form of the mass is seldom preserved.—Edit. Geol. Mag.