ScientificAmerican1894-11-17.jpg Scientific American 1894-09-22ThumbnailsScientific American 1897-11-20Scientific American 1894-09-22ThumbnailsScientific American 1897-11-20Scientific American 1894-09-22ThumbnailsScientific American 1897-11-20Scientific American 1894-09-22ThumbnailsScientific American 1897-11-20Scientific American 1894-09-22ThumbnailsScientific American 1897-11-20
The manufacture of burglar-proof vaults. Door and jamb. Composite plates. Hand-fitting doors and safe vestibule. Butting edges of plates. Screwing up door with ratchet screw driver.



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

Restoration by: magscanner