THIS little book of 75 pages is designed to give to amateurs practical information as to the construction of a small working dynamo-machine. What is aimed at is the building up of a machine capable of ...

THIS volume gives the leading papers and extracts from books, etc., from which we can see the gradual historical development of the modern dynamo. The frontispiece gives a portrait of Faraday and the ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. A patent model for a direct current ...