Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 67
Fio. 37. Magnetize three sewing needles by rubbing them in onedirection with a strong magnet (Fig. 37). Suspend twoof them by silk fibres, as shown in Fig. 38. … Fig. 38. 1. What position does each assume when left to itself at a con-siderable distance from the other ? What is the result if it isdisturbed ? 2. What evidence have you that the needle is subject to one ormore forces ? A magnetized needle suspended so that it is horizontaland is free to rotate…
Physics
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