1. Principles of Alternating Currents. 2. Periodic Functions. 3. Alternators. 4. Induced E.M.F. and Wave-Forms of Alternators. 5. Magnetic Leakage and Armature Reaction. 6. Winding Schemes for Alternators. 7. Design of Alternators. Compounding of Alternators. 8. Examples of Modern Alternators. 9. Steam Turbine Alternators. 10. Synchronous Motors, Motor Generators, Converters. 11. Parallel Running of Alternators. 12. Transformers. 13. Design of Transformers. 14. Induction Motors. 15. Design of Induction Motors. 16. Examples of Induction Motors. 17. Single-Phase Induction Motors. 18. Alternating-Current Commutator Motors. Appendix. The Standardization of Voltages and Frequencies. Complete Index. XX + 848 pages, 546 illustrations, 15 colored plates and 24 large folding plates. 8vo., cloth. $7.50[++]. * * * * * Books for Steam Engineers. =DIAGRAM OF CORLISS ENGINE.= A large engraving giving a longitudinal section of the Corliss engine cylinder, showing relative positions of the piston, steam valves, exhaust valves, and wrist plates when cut-off takes place at 1/4 stroke for each 15 degrees of the circle. With full particulars. Reach-rods and rock shafts. The circle explained. Wrist-plates and eccentrics. Explanation of figures, etc. Printed on heavy paper, size 13 in. ◊ 19 in., =25c.= =THE CORLISS ENGINE= and its Management. A Practical Handbook for young engineers and firemen, (3rd edition) by J. T. HENTHORN. A good little book, containing much useful and practical information. =Illustrated, cloth, $1.00.= =THE FIREMAN'S GUIDE= to the Care and Management of Boilers, by KARL P. DAHLSTROM, M.E., covering the following subjects: Firing and Economy of Fuel; Feed and Water Line: Low Water and Priming: Steam Pressure: Cleaning and Blowing Out; General Directions. A thoroughly practical book. =Cloth, 50c.= =A B C OF THE STEAM ENGINE.= With a description of the automatic shaft governor, with six large scale drawings. A practical handbook for firemen helpers and young engineers, giving a set of detail drawings all numbered and lettered and with names and particulars of all parts of an up-to-date American high speed stationary steam engine. Also a large drawing and full description of the automatic shaft governor. With notes and practical hints. This work will prove of great help to all young men who wish to obtain their engineer's license. =Cloth, price 50c.=