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Government expert listens to broadcasts of automobile [...] The Automotive Section of the Bureau of Standards is studying the anti-knock proportion of fuel used in automobile and aircraft engines and the scientist in this photograph is "listening in" to the signals of an engine instead of listening to a radio broadcasting station. Eventually, these studies may evolve a new engine, one that will use fuel more economically and efficiently

Government expert listens to broadcasts of automobile [...] The Automo...

Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.

Government expert listens to broadcasts of automobile ... The Automotive Section of the Bureau of Standards is studying the anti-knock proportion of fuel used in automobile and aircraft engines and the scientist in this photograph is "listening in" to the signals of an engine instead of listening to a radio broadcasting station. Eventually, these studies may evolve a new engine, one that will use fuel more economically and efficiently

Government expert listens to broadcasts of automobile ... The Automoti...

A black and white photo of a man working in a factory, Library of Congress Harris and Ewing collection Title from unverified caption data on negative or negative sleeve. On sleeve: Watch Your Credit Line. Gift... More