Letter | Published:

The Earliest Magnetic Meridians

Nature volume 52, page 295 | Download Citation

Abstract

IN reply to Prof. L. A. Bauer's letter in NATURE of July 18, p. 269, I may remark that I possess two of Churchman's Magnetic Atlases. The first of these I now believe was published in 1790, and to be that described in his tract, “An Explanation of the Magnetic Atlas, Philadelphia, 1790.” The lines on this chart are magnetic meridians only, as fully defined in Churchman's text, and largely based upon Cook's observations of the variation.

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  1. London, July 20.

    • ETTRICK W. CREAK

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DOI

https://doi.org/10.1038/052295a0

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