Improvements in steam shovels. Ninety-five ton shovel. Mining ore.



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

Restoration by: magscanner

Created on

Monday 7 June 2010

Posted on

Monday 7 June 2010

Keywords

civil engineering, construction, digging, excavation, power

Albums

• General Magazines / Science and Technology Magazines / Scientific American

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