THE first edition of Mr. Maycock's little book was reviewed in the issue of NATURE for January 14, 1892 (vol. xlv., p. 248). The present issue has I been revised thoroughly and enlarged considerably.

THE best method of training electrical engineers will probably remain a subject of discussion so long as the profession continues to be a profitable one. Whether recourse should be had to the factory ...

The film discusses the historical development and principles of electrodynamics, starting with Luigi Galvani's chance discovery of electric current through the twitching of a frog's leg. It explains ...