Testing Collection (page 3)

Testing the cables on Brooklyn Bridge, c1900. Brooklyn Bridge, New York, opened 1883: E.F. Farrington, master mechanic, testing the first span of wire cables. Wood engraving c1900

Assayer testing samples of gold and silver, 1683. Copperplate engraving from the 1683 English edition of Beschreibung Allerfurnemisten Mineralischen Ertzt (Treatise on Ores and Asssaying)

Hartley Soule with Fairchild 22, Langley Field, Virginia, USA, April 25, 1932. American aerospace engineer Hartley Soule stands in front of a Fairchild 22 monoplane with a leading edge high lift

Richard Whitcomb with Area Rule Wind Tunnel Model, USA, April 20, 1955. Creator: Unknown
Richard Whitcomb with Area Rule Wind Tunnel Model, USA, April 20, 1955. Aviation pioneer Richard Whitcomb worked at the Langley Research Center in Virginia throughout his exceptionally prolific life

Flying boat construction, Virginia, USA, April 24, 1946. Creator: Unknown
Flying boat construction, Virginia, USA, April 24, 1946. Male and female technicians at the Langley Memorial Aeronautical Laboratory (now NASAs Langley Research Center)

Engineers check body revolution model, Ohio, USA, July 31, 1957. Creator: Unknown
Engineers check body revolution model, Ohio, USA, July 31, 1957. Engineers at the Lewis Flight Propulsion Laboratory making a check on the body of a model of a supersonic aircraft before a test run

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