Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 697
he attraction in this case is inversely pro-portional to the distance between the magnet and the iron. When the distance between the magnet and the iron is small, Tyndallfound that the attraction is directly proportional to the square of the strengthof the magnet ; but when the iron and the magnet… … Fig. 646. strewn on the paper, on tapping the frame the filings will be found to arrangethemselves in thread-like curved lines, stretching from pole to pole (fig. 646).These lines form what are called 7nagnetic curves. The direction of thecurve at any point represents the direction of the lines of…
Physics
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