The young folk's cyclopædia of games and sports ; (1899)
Champlin, John Denison, 1834-1915, Bostwick, Arthur Elmore, 1860-1942, joint author · New York, H. Holt and company · leaf 489
d, to keep the point in its posi-tion, draw the eye down toward theother pole. If this is done skil-fully, the needle will remain sus-pended horizontally just above themagnet. Electro-Magnets. A bar electro-magnet can be made by windinginsulated copper wire around a barof soft iron. To make… … Electro-Magnet. then be arranged as if a single barhad been wound in the same direc-tion for its entire length and thenbent. This will be seen by windingstring around a flexible stick, andthen bending it. The size of wire used depends oncircumstances. The larger it is,the less resistance it has to…
Games · Sports · Card games
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