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: Book
Language:English
Published: Philadelphia : Printed by James & Johnson, 1790.
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Call Number: LCP Old HSP Wxc* 1
Copy 1 Available
Copy 1 Available