Chapters On Electricity An Introductory Text book for Students in College
The book Chapters On Electricity An Introductory Text book for Students in College was written by author Samuel Sheldon Here you can read free online of Chapters On Electricity An Introductory Text book for Students in College book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Chapters On Electricity An Introductory Text book for Students in College a good or bad book?
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This convergence is the effect of perspective, the lines being in fact straight and parallel. 630. Why is the Earth a Magnet? Modern discoveries in electro-magnetism and thermo-electricity furnish a clew to the hypothesis which generally prevails at this day. Attention has been drawn to the remarkable agreement between the isothermal and the isomagnetic lines of the globe. The former descend in crossing the Atlantic Ocean toward America, and there are two poles of maximum cold in the northern h...emisphere. The isoclinic and the isodynamic curves also descend to lower latitudes in cross- ing the Atlantic westward ; so that, at a given latitude, the degree of cold, the magnetic dip, and the magnetic intensity, are each con- siderably greater on the American than on the European coast. This is only an instance of the general correspondence between these different systems of curves. It has likewise been noticed (Art. 619) that the needle has a movement diurnally, varying west- ward during the middle of the day, and eastward at evening, and that this oscillation is generally much greater in the hot season than the cold.
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