The Washington, Baltimore and Indiana single-phase road is the latest in the field, contracts having been placed very recently. The current will be transmitted at 33,000 volts and 25 cycles, then being stepped down to 6,600 volts on the trolley. The road will be 60 miles long and will be equipped with General Electric apparatus. Four 125-H. P. motors capable of operating on either alternating current or direct current will be used, and the cars will be capable of a speed of 60 miles per hour.


INDEX


ANNOUNCEMENT OF COMING
BOOKS
PRACTICAL AND SCIENTIFIC

CARPENTRY. By G. Townsend. 150 pp., 224 illus. A working manual for Carpenters and Woodworkers in general. Not a theoretical treatise, but a practical working guide. Price, $1.00

GAS ENGINES AND PRODUCERS. By Marks and Wver. 150 pp., 90 illus. Latest information in this rapidly developing field. For Engineers, Machinists, Automobilists. Price $1.00

MASONRY CONSTRUCTION. By Phillips and Byrne. 140 pp., 44 illus. Latest and best American methods. Price $1.00

WATER SUPPLY. By F. E. Turneaure. 150 pp., 40 illus. An exhaustive compendium for Sanitary and Waterworks Engineers and all interested in matters affecting public health. Price $1.00