Illustrated. 8vo., cloth Net, $1.50

Being a practical treatise on the proper method of operating a street-railway motor-car; also giving details how to overcome certain defects. Second Edition. Illustrated. 16mo., cloth, 247 pp Net, $1.00

122 illustrations. 5 1/2 x 8 3/4, cloth, 228 pp Net, $3.50

LOCKWOOD, T. D. Electricity, Magnetism, and Electro-Telegraphy.

A Practical Guide and Handbook of General Information for Electrical Students, Operators, and Inspectors. Fourth Edition. Illustrated. 8vo., cloth, 374 pp $2.50

Being a description of the work of Hertz and his successors. Third Edition Illustrated. 8vo., cloth Net, $2.00

Fourth Edition, revised. Illustrated. 16mo., cloth, 116 pp. (No. 39 Van Nostrand's Science Series.) 50 cents

126 illustrations, 4 color plates. 6 x 9, cloth, 350 pp $3.00