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The manufacture of steel tubing -- Bessemer converters as the National Tube Works, McKeesport, Pennsylvania. First few minutes of the blow. The "Fining" stage. Casting the ingots. The "Boil" of eight minutes duration.
Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past
Restoration by: magscanner
- Created on
- Saturday 12 December 2009
- Posted on
- Saturday 12 December 2009
- Tags
- fabrication, foundry, iron, pipe, steelworks
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