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Scientific American, Vol. 58, No. 1 (January 1888) (1888)

leaf 4

An illustration from Scientific American, Vol. 58, No. 1 (January 1888), 1888, leaf 4
m- This is the way to make the oracle speak ; we will been moistened by sprinkling—were collected in a afterward give the secret of its accurate answers. age is done. Often under new cars one can see loose rods bearing upon stay rods and trusses, with- We write upon 18 prepared cards a series of… … conceals a vertical U-shaped magnet, having its Fig. 2. DETAILS OF THE UAGNETIC OBACLE. two poles near the base, as shown in Fig. 2. In each of the cards there is another magnet vibration. If the louder noises and sounds about concealed, a straight rod, occupying a different cars and locomotives…

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