Electric propulsion test facility at NASA's Lewis Research Center (now Glenn Research Center), c. 1965. Full caption: "TANK 7 IN CELL 4A OF THE ELECTRIC PROPULSION RESEARCH BUILDING EPRB"

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Previously:

1956 NACA metallurgical services worker - photo
1956 NACA magnaflux inspection - photo
1951 NACA 20-inch compressor in lathe - photo
1954 NASA chemist - photo
1956 NACA wind tunnel wall jacks - photo