. Electric railway journal . with 328,180 car-mileage and $90,000 receipts during1906. April 17, 1909.] ELECTRIC RAILWAY JOURNAL. 735 IMPORTANT AUTOMATIC SWITCHING INSTALLATIONSIN WASHINGTON, D. C. Because of the erection of the new union railroad sta-tion in Washington, D. C, the two electric railways ofthat city constructed during 1908 about 2 miles of tan-gent and curved track on the station plaza and work was carried out by a board of constructioncomposed of D. S. Carll and J. H. Hanna, respectively lasa ■ men and one flagman, but after a few months of operationby hand swit
. Electric railway journal . with 328,180 car-mileage and $90,000 receipts during1906. April 17, 1909.] ELECTRIC RAILWAY JOURNAL. 735 IMPORTANT AUTOMATIC SWITCHING INSTALLATIONSIN WASHINGTON, D. C. Because of the erection of the new union railroad sta-tion in Washington, D. C, the two electric railways ofthat city constructed during 1908 about 2 miles of tan-gent and curved track on the station plaza and work was carried out by a board of constructioncomposed of D. S. Carll and J. H. Hanna, respectively lasa ■ men and one flagman, but after a few months of operationby hand switching, it was decided to install a comprehen-sive electro-mechanical interlocked switch and signal sys-tem built by the American Automatic Switch Company, ofNew York, and devised by Roy V. Collins, chief engineerof that company. The new system was placed in serviceduring the extraordinary traffic succeeding the Presiden-tial inauguration in March, and has been in continuousoperation ever since, without mishaps of any Washington Electric Switching System—Exterior and Interior Views of Tower Control Cabinet and Switch-Throwing Mechanism general manager and chief engineer of the Capital Trac- Experience with this automatic method of car controltion Company; H. W. Fuller and C. S. Kimball, respec- brought out clearly several advantages over hand switch-tively general manager and engineer maintenance of way, ing. In the first place, the only visible features of the in-
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