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Examining strain cultures for possible contamination. USPHS (United States Public Health Service) Rocky Mountain Laboratory, Hamilton, Montana

Examining strain cultures for possible contamination. USPHS (United St...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Steel manufacture, Allegheny-Ludlum. No lumberyard this! These are billets of stainless steel, ready to through the hot rolling mills to be pressed into strips. The chipping and grinding on the surfaces of these billets is designed to remove all contamination and defects, so that the steel may meet the high quality requirements of being able to resist corrosion

Steel manufacture, Allegheny-Ludlum. No lumberyard this! These are bil...

Public domain photograph of 1930s-1940s industrial development, no copyright restrictions image - Picryl description

Conversion. Beverage containers to aviation oxygen cylinders. Once the two-half cylinders are joined together into a complete shatterproof high altitude flying oxygen cylinder on the production line of a huge rubber factory now producing metal essential for the Army, all traces of inside weld scale must be removed to prevent contamination of oxygen. In this process, a special chemical solution is drawn through the cylinder at controlled temperature and all foreign matter is removed. Firestone, Akron, Ohio

Conversion. Beverage containers to aviation oxygen cylinders. Once the...

Picryl description: Public domain image of people, meeting, eating, drinking, food, beverage, 1930s, free to use, no copyright restrictions.