ScientificAmerican1897-09-11.jpg Sleeper Radio Construction Sets -1922AThumbnailsRadio 1927-11Sleeper Radio Construction Sets -1922AThumbnailsRadio 1927-11Sleeper Radio Construction Sets -1922AThumbnailsRadio 1927-11Sleeper Radio Construction Sets -1922AThumbnailsRadio 1927-11Sleeper Radio Construction Sets -1922AThumbnailsRadio 1927-11
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