ScientificAmerican1917-11-17.jpg Scientific American 1917-11-10ThumbnailsScientific American 1917-11-24Scientific American 1917-11-10ThumbnailsScientific American 1917-11-24Scientific American 1917-11-10ThumbnailsScientific American 1917-11-24Scientific American 1917-11-10ThumbnailsScientific American 1917-11-24Scientific American 1917-11-10ThumbnailsScientific American 1917-11-24

"Electrically controlled machine for manipulating steel billets under a forging press" -- heavy machinery in a steel mill, in operation.