of the Car& Any Child Can Do lt. Perfect demonstration of the railroad of the future. String the wire tight. start top spin will travel entire length. Also illustrates' motion of earth through its orbit. Baffles Science delights children astounds the more you spin it the more it will puzzle you. 50c Buys Entire Outfit, scientific american, -1909-08-07

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of the Car& Any Child Can Do lt. Perfect demonstration of the railroad of the future. String the wire tight. start top spin will travel entire length. Also illustrates' motion of earth through its orbit. Baffles Science delights children astounds the more you spin it the more it will puzzle you. 50c Buys Entire Outfit, scientific american, -1909-08-07

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