ScientificAmerican1903-04-04.jpg Scientific American 1897-01-23ThumbnailsScientific American 1904-02-06Scientific American 1897-01-23ThumbnailsScientific American 1904-02-06Scientific American 1897-01-23ThumbnailsScientific American 1904-02-06Scientific American 1897-01-23ThumbnailsScientific American 1904-02-06Scientific American 1897-01-23ThumbnailsScientific American 1904-02-06
Track welding by means of the electric current. Sand-blast equipment. Grinding the finished joint. The electric welder at work. Welding train.



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

Restoration by: magscanner