. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . are only three rolled sec-tions, which are, of course, easily pro-curable from any steel mill. The object of this design was to doaway with the six-wheel truck whichhad formerly been used under 60-tootbaggage and mail cars, and to substi-tute a four-wheel truck which wouldanswer as well. The truck can be ap-plied to all this class of equipment wherethe weight is such that usually a six-wheel truck with 4 1-4 by 8-inch jour-nals would be required. The two axlesused in the steel truck have 5 by
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . are only three rolled sec-tions, which are, of course, easily pro-curable from any steel mill. The object of this design was to doaway with the six-wheel truck whichhad formerly been used under 60-tootbaggage and mail cars, and to substi-tute a four-wheel truck which wouldanswer as well. The truck can be ap-plied to all this class of equipment wherethe weight is such that usually a six-wheel truck with 4 1-4 by 8-inch jour-nals would be required. The two axlesused in the steel truck have 5 by 9-inchjournals. Four mail cars have been inconstant service with the steel trucksince January, 1901, and the design thenadopted has in every way justified an-ticipations. The hangers have a forkedupper end, which grasps a steel castingon each side of the I-beam forming thetransom. These castings are carriedback to the side frames, and when flaredout unite side frames and transoms in enabled to present this design to ourreaders through the courtesy of Mr. Ball, Superintendent of Itailuittj f Locumvtife Enjinuriitj^STEEI. FRAME PASSENGER CAR TRUCK—L. S. & M. S. RY. built, 9 years before the French com-pound mentioned in your paper. J. L. Angus,Mechanical Engineer. [The item which our correspondent re-fers to was not correct, but he is alsoaway behind on the history of com-pounds. In 1844 Thomas Craddock ex-perimented in England with a compoundlocomotive. In 1850 the Nicholson-Sam-uels compound was run for some compound locomotive was built in1867 in Buffalo, N. Y., and was used forsome time on the Erie Railroad. We pub-lish a book on compound locomotiveswhich gives a -fairly correct history. Italso contains other information that everymechanical engineer ought to know.—Ed.] Passenger Truck with Steel Frame. The Lake Shore & Michigan South-ern Railway, some time ago, designedand put into service some 4-wheel, steelframe, baggage car trucks, which aft
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