Second Edition, enlarged. With Diagrams and Figures. 8vo., pamphlet, 75 pp Net, $1.00

Second Edition, revised and enlarged. Illustrated. 8vo., cloth, 269 pp Net, $2.50

Second Edition, corrected. Illustrated . 8vo., cloth, 229 pp Net, $2.00

SEWELL, T The Construction of Dynamos (Alternating and Direct Current).

A Text-book for students, engineering contractors, and electricians-in-charge. Illustrated. 8vo., cloth, 316 pp $3.00

SHELDON, S., and HAUSMANN, E Dynamo-Electric Machinery: Its Construction, Design, and Operation.

Vol.1.: Direct-Current Machines.

Ninth Edition, completely re-written. Illustrated. 12mo., cloth, 281 pp Net, $2.50

Tenth Edition, rewritten. cloth, 353 pp Net, $2.50