. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ire box, water space, front, 5 ins.; sides. 4^ins.; back. 4^2 ins.; heating surface, tubes, 2,499sq. ft.; heating surface, fire box, 177 sq. ft.;heating surface, total, 2,676 sq. ft.; grate fur-nace, sq. ft.; smoke stack, top above rail,15 ft. 3 ins. Tender—Weight, empty, ,55,460 lbs.; water capac-ity, 6,000 gal.; coal capacity, 12 tons. Signals and Signaling. BY GEORGE S. HODGINS. ( Continued from page 7.) THE TRAIN ORDER SIGNAL. The train order signal is generally atwo position si
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ire box, water space, front, 5 ins.; sides. 4^ins.; back. 4^2 ins.; heating surface, tubes, 2,499sq. ft.; heating surface, fire box, 177 sq. ft.;heating surface, total, 2,676 sq. ft.; grate fur-nace, sq. ft.; smoke stack, top above rail,15 ft. 3 ins. Tender—Weight, empty, ,55,460 lbs.; water capac-ity, 6,000 gal.; coal capacity, 12 tons. Signals and Signaling. BY GEORGE S. HODGINS. ( Continued from page 7.) THE TRAIN ORDER SIGNAL. The train order signal is generally atwo position signal, and is defined inthe report of the committee on sig-naling and interlocking, which waspresented to the American RailwayEngineering and Maintenance of Way Watt made his first model of a con-densing engine out of an old anatomistsyringe used to inject the arteries pre-vious to dissection. The great inventor is one who haswalked forth upon the industrial world,not from universities, but from work-shops; not clad in silks and decked withhonors, but clad with fustian and grimedwithsoot and BLACK AUTOMATIC SIGNAL AT DANGER.(Described on page 9, January issue.) -Association, in Chicago, in March, recommended definition of thetrain order signal reads: A signalfixed or otherwise of two indications,which, in the stop position, informs theenginemen and conductor that they areto receive orders at the telegraph office,and in the clear position announces thatthere are no orders for them. This definition includes a recog-nition of the use of flags as train ordersignals, and, indeed, the report definite-ly mentions them as legitimate signalsfor such a purpose. The tendency ofmodern practice is to standardize andmake uniform signal appliances andmethods, and though the flags hung outbeside the telegraph operators win-dow may give a satisfactory stop orproceed signal at a station, the prac-tise is not likely to grow in favor. The early form of train order signalwas that of
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