ScientificAmerican1872-09-28.jpg Scientific American 1872-09-21ThumbnailsScientific American 1872-10-05Scientific American 1872-09-21ThumbnailsScientific American 1872-10-05Scientific American 1872-09-21ThumbnailsScientific American 1872-10-05Scientific American 1872-09-21ThumbnailsScientific American 1872-10-05Scientific American 1872-09-21ThumbnailsScientific American 1872-10-05

Berryman's combined regulator and alarm for steam engines.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner