Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 365
etic 2^oles,the field is vertical. Any great circle passing throughthe axis pp is a magnetic meridian.The declination at a point M (Fig.206) is the angle which the greatcircle, through this point and theaxis, makes with the geographicalmeridian. It varies from point topoint along the same meridian,… … Fig. 20(5. 246] GAUSSS THEORY 343 exactly noith and south. This circle forms the periphery of Fig.206. On one side of this plane the north pole deflects towardstlie west, and the declination is westerly ; on the other side it isdeflected to the east, and the declination is easterly. Tiie magnetic…
Electricity · Magnetism
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-214-129.webp)
