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Scientific American 1924-11

ScientificAmerican1924-11.jpg Scientific American 1913-01-25ThumbnailsTheatre 1912-05Scientific American 1913-01-25ThumbnailsTheatre 1912-05Scientific American 1913-01-25ThumbnailsTheatre 1912-05Scientific American 1913-01-25ThumbnailsTheatre 1912-05

"New scientific methods for the control of theatre lights"