Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 16
st the centre of the magnet on topof a bottle or block ofwood, as in Fig. 1, andsuspend a tack from oneend, then carefully at-tach a second tack tothe first, and so proceeduntil you have as long achain of tacks as themagnet will hold. Count and record the number of tacks.Remove the chain and repeat… … Distance from right-hand end of magnet. Number of tacks. Holding the magnet vertically, measure in the sameway its power at the ends. 4 MAGNETISM. Definitions.—The points in the magnet where the mag-netism is the strongest are called the Poles. When one body moves towards another, as the tackmoved…
Physics
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