THIS work, which is considerably enlarged from its first appearance, now includes accounts of all the leading forms of dynamo- and magneto-electric machines with the exception of those of Edison, of ...

ELECTRICAL inventions of innumerable kinds have of late followed one another with bewildering rapidity; and the impetus to invention afforded by the present development of electric lighting, and by ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. The dynamo was donated thru Ohio ...

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If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

A direct current generator mounted on a wooden display base. Cylindrical cast iron frame with armature having an oil cup and a commutator at one end with brushes fixed to the frame. (Brushes are ...