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MUNN & CO., 361 Broadway, New York.
A COMPLETE ELECTRICAL LIBRARY
By Prof. T. O'CONOR SLOANE,
Comprising five books, as follows:
| Arithmetic of Electricity, 138 pages. | $1.00 |
| Electric Toy Making, 140 pages. | 1.00 |
| How to Become a Successful Electrician, 189 pp. | 1.00 |
| Standard Electrical Dictionary, 682 pages. | 3.00 |
| Electricity Simplified, 158 pages. | 1.00 |
The above five books by Prof. Sloane may be purchased singly at the published prices, or the set complete, put up in a neat folding box, will be furnished to Scientific American readers at the special reduced price of Five dollars. You save $2 by ordering the complete set. Five volumes, 1,300 pages, and over 450 illustrations.