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Scientific American, Vol. 42, No. 3 (1880) (1880)

leaf 5

An illustration from Scientific American, Vol. 42, No. 3 (1880), 1880, leaf 5
or will be readily understood by reference to the The arrangement requires a couple of lanterns—one to engraving, and will be apprectated by practical engineers. project the left eye half of a stereoscopic transparency, The great saving in fuel, the steady power, the regularity of the other the… … described in every respect except size, this reflecting and the refracting telescopes are PEERLESS DAMPER REGULATOR. latter bearing the same proportion to the being investigated. As the trust deed directed thatthe instrument should be the larger disk as the eye does to the lantern lens, The…

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