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Scientific American, Vol. 32, No. 25 (1875) (1875)

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An illustration from Scientific American, Vol. 32, No. 25 (1875), 1875, leaf 0
shown in the engraving, it is claimed, possesses placed on the negative pole, corresponding non-luminous the advantages of simplicity, durability, and adaptability to SPO OO the labor common to the cotton plantations of the South. spots appear on the positive pole. Hence it is evident that The… … times; also to make a space wishes to avoid proposing any through which the trash may until a sufficient number of we may telegraph through the air from the negative to the facts have been accumulated. The facts will then tell their fall, and sand and dust may be blown by the drum into the positive…

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