Science and Invention -1925A.jpg ThumbnailsScientific American 1899-07-01ThumbnailsScientific American 1899-07-01ThumbnailsScientific American 1899-07-01ThumbnailsScientific American 1899-07-01
$5000.00 for Perpetual Motion, a bet they knew they couldn't lose. Ad has pictures of three machines that did not work, and a cover image of the magazine with article on the subject. Published in the April, 1925 issue of RADIO NEWS.



Source: Magazine collector Steve Davis

Restoration by: magscanner