ScientificAmerican1920-11-27.jpg Scientific American 1919-05-31ThumbnailsScientific American 1919-05-31ThumbnailsScientific American 1919-05-31ThumbnailsScientific American 1919-05-31Thumbnails
Detecting and locating automobile engine troubles with the stethoscope.



Artist: Howard V. Brown

Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner