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Scientific American 1903-05-23

ScientificAmerican1903-05-23.jpg Scientific American 1901-08-10ThumbnailsScientific American 1917-07-07Scientific American 1901-08-10ThumbnailsScientific American 1917-07-07Scientific American 1901-08-10ThumbnailsScientific American 1917-07-07Scientific American 1901-08-10ThumbnailsScientific American 1917-07-07Scientific American 1901-08-10ThumbnailsScientific American 1917-07-07

The anthracite coal industry. Breaker head. Underground office. Vein, thickness. Boys employed in the breaker rooms. Coal loading machine.



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

Restoration by: magscanner