No quotes yet. Add a line of Sydney Chapman’s that stayed with you.
The lunar and solar daily variations of thehorizontal geomagnetic vector at Greenwich, 1848-1913, with an appendix of the lunar daily variation of magnetic declination at Pavlovsk and Sitka.
Sydney Chapman
The lunar and solar daily variations of thehorizontal geomagnetic vector at Greenwich, 1848-1913, with an appendix of the lunar daily variation of magnetic declination at Pavlovsk and Sitka.