ScientificAmerican1875-08-28.jpg Scientific American 1875-08-21ThumbnailsScientific American 1875-09-04Scientific American 1875-08-21ThumbnailsScientific American 1875-09-04Scientific American 1875-08-21ThumbnailsScientific American 1875-09-04Scientific American 1875-08-21ThumbnailsScientific American 1875-09-04Scientific American 1875-08-21ThumbnailsScientific American 1875-09-04

Berryman's feed water heater and purifier. Also: an obituary for Wilhelm Bauer, German submarine designer.