Sujet
Scientists Test Auto Ignition
Légende
Washington, D.C.: August 22, 1931
Two engineers at the U.S. Bureau of Standards use a cathode ray oscillograph to test charteristics and effiveness of various types of sparks used for automobile engine ignition.
Date
22 août 1931
Crédit
Photo12/Underwood Archives/UIG
Notre référence
UMG20A12_406
Model release
Non
Property release
NA
Licence
Droits gérés
Format disponible
52.3Mo (8.5Mo) / 40.6cm x 32.3cm / 4800 x 3812 (300dpi)