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Scientific American, Vol. 86, No. 11 (March 1902) (1902)

leaf 3

An illustration from Scientific American, Vol. 86, No. 11 (March 1902), 1902, leaf 3
nment, on not be prosecuted until after the summer floods, which lar kinds of work, it is necessary to work with sur- making inquiries in England early in October, found would involve the loss of a year's time. Accordingly faces illuminated as evenly and as brightly as pos- that two years were… … tensity and uniformity, the illumi- Fig. 1.—PLAN VIEW OF THE PROJECTOR IN Fig. 2.—A TRANSVERSE DISPERSER bridges. The Pencoyd Iron Works, nated square has a width and OPERATION. PROJECTOR. allowing two weeks for shipment to height of 85 centimeters, with the Liverpool, promised the delivery of…

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