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Scientific American 1920-09-04

ScientificAmerican1920-09-04.jpg Scientific American 1913-09-13ThumbnailsScientific American 1921-09-24Scientific American 1913-09-13ThumbnailsScientific American 1921-09-24Scientific American 1913-09-13ThumbnailsScientific American 1921-09-24Scientific American 1913-09-13ThumbnailsScientific American 1921-09-24

Working with bare hands on live lines by means of the safety stage.