. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . tional Chart No. 126 .Signal Lights. J. F. Springer 130 ■.■\rad-Csanad Railway. A. S. ^rartin 138 •Caledonian Breakdown Crane 139 — General Correspondence loi Book Notices It3 .\pplied Science *. 115 Ouestions .Answered 116 .Air Brake 119 Electrical 121 Personal Items 127 EDITORL\I-S— Help in Kringing Back Prosperity iin Electric Locomotive Inspection Trip iii Steam Pipes lit Co-ordination Without 111 Cultivating Mental Growth tia Rl!!%S%»EHiiiNriiK
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . tional Chart No. 126 .Signal Lights. J. F. Springer 130 ■.■\rad-Csanad Railway. A. S. ^rartin 138 •Caledonian Breakdown Crane 139 — General Correspondence loi Book Notices It3 .\pplied Science *. 115 Ouestions .Answered 116 .Air Brake 119 Electrical 121 Personal Items 127 EDITORL\I-S— Help in Kringing Back Prosperity iin Electric Locomotive Inspection Trip iii Steam Pipes lit Co-ordination Without 111 Cultivating Mental Growth tia Rl!!%S%»EHiiiNriiK Copyright by Angus Sinclair Co.—1909 A Practical Journal of Motive Power, Rolling Stock and Appliances Vol. XXII. 114 Liberty Street, New York, April, 1909 No. 4 Washington Station Signal System. Southern Railroads, has been equipped sition, and at night this position displays The new Union Station at Washington, with a very complete and elaborate signal a red light. The caution position is as- D. C, which is the joint terminal of the system. sumed when the blade is at an angle of 45. \V.\.-^HrXGTON, D. C—LOOKING SOUTH TOWARD NEW UNION . SIGNAL BRIDGE H IN THE NATIONAL CAPITOL SEEN OVER ROOF OF STATION. CONGRESSIONAL LIBRARY TO THE LEFT. DOME Pennsylvania, the Baltimore & Ohio, the The method used is what is known as degs. with end of blade above the hori- Seaboard Air Line, the Atlantic Coast the upper quadrant or three-position sig- zontal, and the yellow caution light is .l-ine, the Richmond, Fredericksburg & nal system. In this arrangement the sem- then visible at night. In the all clear po- Potomac, the Chesapeake & Ohio and the aphore blade is horizontal in the stop po- sition the semaphore blade is vertical, that 142 KAILWAV AND LOCOMOTIVE ENGINEERING April, 1909. is, parallel with the post, and a greenlight is displayed at night. In the allclear position the uppermost blade extendssome distance above the post which sup-ports the si
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