ScientificAmerican1875-09-04.jpg Scientific American 1875-08-28ThumbnailsScientific American 1875-09-11Scientific American 1875-08-28ThumbnailsScientific American 1875-09-11Scientific American 1875-08-28ThumbnailsScientific American 1875-09-11Scientific American 1875-08-28ThumbnailsScientific American 1875-09-11Scientific American 1875-08-28ThumbnailsScientific American 1875-09-11

Power punch and shearing machine. Also: bones and their shapes in animal skeletons.