A laminated horseshoe magnet with 12 plates, an armature and a swivel eye. Painted red except for the bottom 2" of the magnet. A 1909 list records this with other Joseph Henry apparatus. overall: 23 ...
overall: 10 in x 5 1/8 in x 3 1/2 in; 25.4 cm x 13.0175 cm x 8.89 cm ...
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