Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 108
. II. lightly tapped-. The figures- thus obtained can be fixedpermanently by several processes. The best of theseconsists in employing a sheet of glass which has beenpreviously gummed and dried, instead of the sheet ofpaper; after this has been placed above the magnet thefilings are sifted evenly… … Fi.j^. 50. spection of the figure will show that the lines divergenearly radially from each pole, and curve round to meetthese from the opposite pole. Faraday, who made agreat use of this method of investigating the distributionof magnetism in various fields, gave to the lines thename of lines of…
Electricity · Magnetism
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