A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 805
719. Each filing becomes a magnet in thefield of the bar magnet, and the filings then hang together in chains. Bycoating the paper with molten paraffin wax before the experiment andallowing it to cool, a smooth surface is presented to the filings. Afterthey have taken their proper arrangement the… … Fig. 720.—Lines of force by means of iron filings. Strength of magnetic field, or magnetic intensity.—Having seenthat the magnetic field has a definite direction at every point, its
Physics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
