ScientificAmerican1893-12-30.jpg Scientific American 1893-12-23ThumbnailsScientific American 1894-01-06Scientific American 1893-12-23ThumbnailsScientific American 1894-01-06Scientific American 1893-12-23ThumbnailsScientific American 1894-01-06Scientific American 1893-12-23ThumbnailsScientific American 1894-01-06Scientific American 1893-12-23ThumbnailsScientific American 1894-01-06

The Bonta plate and embossed glass rolling machine--rolling the glass. The Bonta plate glass annealing oven.



Source: Steve Kirch, creator of a wonderful website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner