ScientificAmerican1882-12-16.jpg ThumbnailsScientific American 1891-11-07ThumbnailsScientific American 1891-11-07ThumbnailsScientific American 1891-11-07ThumbnailsScientific American 1891-11-07ThumbnailsScientific American 1891-11-07
Pictet refrigeration machinery at Armour & Co.'s pork packing establishment, Chicago.



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

Restoration by: magscanner