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 bein accurately known, the longitude is of consequence truly determined. By John Churchman, late land surveyor for the district of the counties of Delaware and Chester, and for part of Lancaster and Berks, Pennsylvania.

Format:

Book

Author/Creator:

Churchman, John, 1753-1805 19472

Language:

English

Physical Description:

x, [3], 14-46, 5, [1] p., [3] folded leaves of plates : ill. ; 8⁰.

Place of Publication:

Philadelphia : Printed by James & Johnson, on the north side of Market-Street, between Third and Fourth-Streets, M,DCC,XC. [1790]

Notes:

The variation chart was also issued separately and dedicated to George Washington.

Subscribers names come to hand."--p. vi-ix.

"Errata."--p. [6].

Microfilm. Woodbridge, CT Research Publications, Inc., 1986. 1 reel ; 35mm. (The Eighteenth Century ; reel 1619, no. 02).

Local Notes:

HSP in LCP.

Cited in:

English short title catalogue (ESTC), W32217

Evans, 22406