ScientificAmerican1924-12.jpg Scientific American 1924-11ThumbnailsTheatre 1901-10Scientific American 1924-11ThumbnailsTheatre 1901-10Scientific American 1924-11ThumbnailsTheatre 1901-10Scientific American 1924-11ThumbnailsTheatre 1901-10
"New scientific way to find out whether you can sing." Woman in gas mask connected to air flow instrumentation.

Artist: Howard V. Brown

Source: Steve Kirch

Restoration by: Michael Ward