An account of the observations, made by the Philosophical Academy at Paris, May 12 1667. about 9. of the clock in the morning, of an Halo or circle about the Sun; together with a discourse of M. Hugens de Zulechem, concerning the cause of these meteors, as also that of Parelia's or Mock-suns. Englished out of French by the Publisher, to whom it was sent but lately from the worth author of the said discourse

Hugens de Zulichem

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