LONGMANS, GREEN, &- CO.' S PUBLIC ATIONS. 



ELECTRICAL ENGINEERING FOR ELECTRIC LIGHT 

 ARTISANS AND STUDENTS. 



By W. Slingo, Principal of the Telegraphists' School of Science, and A. 



Brooker, Instructor on Electrical Engineering at the Telegraphists' 



School of Science. With 307 Illustrations. Crown 8vo. 640 pages. 



$3.50. 



Contents. — I. Current — Potential — Conductors — Insulators. II. Practical 

 Units — Ohm's Law — Fundamental Units. III. Primary Batteries. IV. Meas- 

 urement of Current Strength. V. Measurement of Resistance. VI. Measure- 

 ment of Electro -Motive Force. VII. Electro - Magnets — Electro - Magnetic 

 Induction. VIII. Dynamo-Electric Machines (Alternate Current). IX. Dyna- 

 mo Electric Machines (Direct Current), X. Direct Current Dynamos — Con- 

 tinued. XI. Direct Current Dynamos (Open Coil). XII. Motors and their Ap- 

 plications. XIII. Transformers. XIV. Secondary Batteries. XV. Arc Lamps. 

 XVI. Incandescent Lamps — Photometry. XVII. Installation Equipment, Fit- 

 tings, etc. Inde.x. 



"It is as complete as anything we have ever seen. It should meet with a 

 hearty reception among electricians and students of electricity, for it is one of 

 the most comprehensive works ever published. Everything that is necessary 

 to a clear understanding of electric lighting and kindred subjects is found in 

 this volume, and we think that every individual of the classes mentioned would 

 greatly further his own interests by possessing and studying this work." — I'he 

 Electric A^e. 



*^* A Prospectus more fully describi7ig the tvork 7nay be had of the Pub- 

 lishers. 



TELEPHONE LINES AND THEIR PROPERTIES. 



I By Prof. W. J. Hopkins, of the Drexel Institute, Philadelphia. With 

 numerous Illustrations. i2mo. [March, 1893. 



The intention of the author has been to provide a book which should prove 

 useful to the practical man, as well as one which would serve as a basis for a 

 lecture course to students. He has therefore thought it desirable to devote 

 some space to the development of correct elementary ideas of matter and 

 energy so as to lead up to the most modern conception of the method of prop- 

 agation of electro-magnetic disturbances. 



ELECTRICITY AND MAGNETISM. 



By Fleeming Jenkin, F.R.SS.L. and E., M.I.C.E., late Professor of En- 

 gineering in the University of Edinburgh. With 177 Illustrations. 

 (Text-Books of Science.) i2mo. 415 pages. $1.25. 



Contents. — Electric Quantity, Potential, Current, Resistance, Electro-Static 

 Measurement, Magnetism, Magnetic Measurements, Electro-Magnetic Meas- 

 urement, Units, Chemical Theory of Electro-Motive Force, Thermo-Electric^ 

 ity, Galvanometers, Electrometers, Galvanic Batteries, Frictional Electrical 

 Machines, Electro-Magnetic Engines, Telegraphic Apparatus, Speed of Sig- 

 nalling, Telegraphic Lines, Useful Applications of Electricity, Mariners' Com- 

 pass, etc., etc. Appendix on the Telephone and Microphone and 27 Tables. 



LONGMANS, GREEN, & CO., 15 East Sixteenth Street, New York. 



