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Scientific American, Vol. 89, No. 22 (1903) (1903)

leaf 17

An illustration from Scientific American, Vol. 89, No. 22 (1903), 1903, leaf 17
398 Novemper 28, 1903. … complete apparatus, size No. 1, $7.50, subject to the trade discount of Signals, lubricating device for train order, : H.' De Wallace...........eseseeeeeeeee 744,309 Beat Signaling, electrical ringing of bells for sub- : Squabs Pay Hens 3334 per cent., or ®5.00 net. FELIX F. DAUS DUPLICATOR CO.,…

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