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An explanation of the magnetic atlas, or variation chart, hereunto annexed : projected on a plan entirely new, by which the magnetic variation on any part of the globe may be precisely determined, for any time, past, present, or future: and the variation and latitude being accurately known, the longitude is of consequence truly determined. /

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Bibliographic Details
Main Author:	Churchman, John, 1753-1805
Format:	eBook
Language:	English
Series:	Early American imprints. Evans (1639-1800) ; no. 22406.
Subjects:	Geomagnetism. Subscribers' lists.
Online Access:	Evans Digital Edition

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