Electricity in every-day life Volume 1
Edwin James Houston
Paperback
(RareBooksClub.com, May 14, 2012)
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ... neutral character of nitrogen. Since two-ninths of the weight of the atmosphere is composed of oxygen, a £eS?aglon substance that is magnetic after the manner of iron, SlVfor of and since, moreover, this substance manifests marked cipaPconchanges in its magnetic properties with changes of theTtmos-£ temperature, it can be seen how strongly it would af-pherefeet the direction of magnetic needles that are completely surrounded by it. Faraday pointed out that such changes in temperature would necessarily pro Fig. in.--Diamagnetic Character of Ordinary Candle Flame. A species of blow-pipe operated by magnetic streamings. duce changes in the direction of magnetic needles, and, as we have already seen, proposed a theory for the earth's magnetism based on this effect. In his "Experimental Researches," No. 2847, Volume III., page 218, on "Atmospheric Magnetism," Faraday speaks as follows, as to the effect which the magnetic character of the oxygen of the air should from Farahave on the variations of the compass needle: ony"Atmos "It is to me an impossible thing to perceive, thatSeti"m."as" two-ninths of the atmosphere, by weight, is a highly magnetic body, subject to great changes in its mag netic character, by variations in its physical conditions of temperature and condensation or rarefaction (2780), and at the same time subject to these physical changes in a high degree, by annual and diurnal variations, in its relation to the sun, without being persuaded that it must have much to do with the disposition of the magnetic forces upon the surface of the earth (2796), and may perhaps account for a large part of the annual, diurnal and irregular variations, for short periods, which are found to occur in relation...