On the general and local causes of magnetic variation and on the probable opposite electric states of the earth's magnetic hemispheres, as the cause of the polar pointing of the magnetic needle / Cunningham, Peter Miller.

Author/creator Cunningham, Peter Miller
Format Electronic
Publication Info[S.l.] : John Wiley & Sons, Inc.,
Supplemental ContentFull text available from Wiley Digital Archives British Association for the Advancement of Science (BAAS)

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