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in this case armor plate, speak for themselves


Fig. 46A. Oxyacetylene cuts on 10-inch steel showing failure to complete cut
(cropped, slightly skewed to restore rectangle; new border)
illustrating Robert Smith Johnston. An investigation of oxyacetylene welding and cutting blowpipes, with special reference to their design, safety, and economy in operation. Technologic Papers of the Bureau of Standards, No. 200 (1922)
University of Michigan copy, digitized May 12, 2011

epigram from page 79

quite a composition.

see Fig. 11.The cutting equipment — for a picture of who’s doing what.

26 April 2014

oxyacetylene welding; cutting; failure; form; labor; race; steel
R. S. Johnson