. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ict it quite as much as the trainline service exhaust, then it cannot bedetected by a service application obstruction, which by far is mostlikely to occur, is a partly closed angle-cock, that is open sufficient to obtain aservice application, but not enough topermit quick action, or emergency ap-plication, back of this point Trainmen and inspectors should be re-quired to fully open all angle-cocks. Butwhy should we be satisfied that theyhave done so without proving it by atest any mo
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ict it quite as much as the trainline service exhaust, then it cannot bedetected by a service application obstruction, which by far is mostlikely to occur, is a partly closed angle-cock, that is open sufficient to obtain aservice application, but not enough topermit quick action, or emergency ap-plication, back of this point Trainmen and inspectors should be re-quired to fully open all angle-cocks. Butwhy should we be satisfied that theyhave done so without proving it by atest any more than we should be satis-fied that they have opened them at all?And so I would ask, should not brakesbe tested by an emergency applicationas well as by a service application? E. G. A. B. Inspt., Boston & Albany R. R. Sl^ringfield. Mass. Dont fail to get a copy of the proceed-ings of the Air Brake Association for1902. Its treatise on Frozen TrainPipes, their Cause and Cure, is aloneworth the price of the book. Price. 50cents in paper, and 75 cents in leatherbinding, at this SLACK ADJUSTER ON DRIVER BRAKES. be a partial stoppage of the train pipeat the forward end of the first car. Andwith a freight train, say of 50 cars, andthe partial stoppage was in the trainpipe on, say the 20th car, the danger re-sulting would be, in addition to the long-er distance necessary to stop in, a severeshock to rear part of the train. Infact the result would be similar to thatwhich occurs on a train of 50 cars withonly 20 cars in use and an emergency Brakes Dragging on Long FreightTrains. I would like to ask whether the would not cause train pipe leaksto be neglected and become worse in-stead of better. J. E. Moorall. [While the ii-inch has a greater capac-ity, its use would probably be attendedwith greater neglect of train pipe leakage.—E0.] October, 1902. RAILWAY AND LOCOMOTIVE ENGINEERING 443 QIESTIONS AND ANSWERS On Air Brake Subjects. (193; B. R. 0., New York
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