*JOHNSON, J. H. Arc Lamps and Accessory Apparatus.* 20 illustrations. 16mo., cloth, 135 pp. (Installation Manuals Series) Net, 75 cents.

*JOHNSON, T. M. Ship Wiring and Fitting.* 47 illustrations. 16mo., cloth, 92 pp. (Installation Manuals Series) Net, 75 cents.

Wireless Telegraph Construction For Amateurs — Part 120

*JONES, HARRY C. The Electrical Nature of Matter and Radioactivity.* _Third Edition, revised._ 5 1/2 x 8 1/2, cloth, 218 pp Net, $2.00

Wireless Telegraph Construction For Amateurs — Part 120

*KAPP, GISBERT. Alternate-Current Machinery.* Illustrated. 16mo., cloth, 190 pp. (No. 96 Van Nostrand’s Science Series) 50 cents

Wireless Telegraph Construction For Amateurs — Part 120

*KAPPER, F. Overhead Transmission Lines and Distributing Circuits.* 297 illustrations. 2 plates, 7 1/4 x 10, cloth, 310 pp Net, $4.00

*KENNEDY, R. Electrical Installations of Electric Light, Power, and Traction Machinery.* Illustrated. 8vo., cloth, 5 vols. The set $15.00. Each $3.50

*KENNELLY, A. E. Theoretical Elements of Electro-Dynamic Machinery.* Vol. I. Illustrated. 8vo., cloth, 90 pp $1.50

*KERSHAW, J. B. C. The Electric Furnace in Iron and Steel Production.* Illustrated. 8vo., cloth, 74 pp Net, $1.50

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*KINZBRUNNER, C. Continuous-Current Armatures; their Winding and Construction.* 79 Illustrations. 8vo., cloth, 80 pp Net, $1.50

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*KLINGENBERG, G. Large Electric Power Stations.* Their design and construction, with examples of existing stations. 180 illustrations, 7 plates, 7 x 10, cloth, 260 pp Net, $5.00

*KOESTER, F. Hydroelectric Developments and Engineering.* A practical and theoretical treatise on the development, design, construction, equipment and operation of hydroelectric transmission plants. _Second Edition_. 500 illustrations. 4to., cloth, 475 pp. Net, $5.00

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