ScientificAmerican1897-09-11.jpg Radio 1927-11ThumbnailsSleeper Radio Construction Sets -1922ARadio 1927-11ThumbnailsSleeper Radio Construction Sets -1922ARadio 1927-11ThumbnailsSleeper Radio Construction Sets -1922ARadio 1927-11ThumbnailsSleeper Radio Construction Sets -1922ARadio 1927-11ThumbnailsSleeper Radio Construction Sets -1922A
A home-made alternating current dynamo. How to build one without castings.



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

Restoration by: magscanner