Specimen of steel produced by the Basic or Thomas-Gilchrist process
- Made:
- 1877
Specimen of steel produced by the Basic or Thomas-Gilchrist process, 1877, two flat bars 1 1/8" x 3/8" partly welded and twisted
Specimen of steel produced by the Basic or Thomas-Gilchrist process, 1877, two flat bars 1 1/8" x 3/8" partly welded and twisted