Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 167
n that magnet pole. If it exertedtwice that force we would say there were 20,000 lines tothe square inch. Perhaps units of force would be a better name forthis. 168 ELEMENTARY ELECTRICITY It has been proposed to drop the expression line offorce when used as units of force/ and say 10,000gausses.… … Fig. 80. The Magnetic Field of a Bar Magnet as shown bjIron Filings. Lift iron filings over the glass and tap very gently.The filings will arrange themselves and show the direc-tion of the magnetic force at all points. Many different combinations of poles should be tried.Figs. 80 and 81 show two…
Electricity
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