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7 résultats pour : national bureau of standards

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Machine to test the endurance of women's shoes
UMG22A16_495

Machine to test the endurance of women's shoes

A study of the mechanism of the flame propogation in the cylinder of a internal combustion engine is being made at the U.S. Bureau of Standards for the National Advisory Committee for Aeronautics circ...
UMG21A21_021

A study of the mechanism of the flame propogation ...

Workers at the National Bureau of Standards testing the strength of glass panels circa 1938 .
UMG21A21_391

Workers at the National Bureau of Standards testin...

A National Bureau of Standards worker conducting experiement to help with movie film preservation circa 1938.
UMG21A21_394

A National Bureau of Standards worker conducting e...

A National Bureau of Standards worker conducting experiement to help with movie film preservation - folding endurance test circa 1938.
UMG21A21_395

A National Bureau of Standards worker conducting e...

A National Bureau of Standards worker conducting experiement to help with movie film preservation - resistance testing circa 1938.
UMG21A21_396

A National Bureau of Standards worker conducting e...

Scientists Test Auto Ignition
UMG20A12_406

Scientists Test Auto Ignition