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Scientific American, Vol. 99, No. 22 (November 1908) (1908)

leaf 12

An illustration from Scientific American, Vol. 99, No. 22 (November 1908), 1908, leaf 12
heads in the compartments. These a small prick punch a number of indentations are of cardboard. You pass it along. It is neither a persons will be hidden behind a curtain, as indicated made in it between the outlines of the design. prism nor a lens, and changes nothing in the position After the… … metal soldered on the inside of the shade are now The key to the mystery is the peculiar nature of the intense light sent by the surface of the glass. turned over, so as to hold the glass in place. Care 0B> TOUCHING THE BUTTON ONE FACE MEBGES What seems to be a single plate of glass is a bundle…

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