. Electric railway journal . SE SWITCHES AND MATES The Chicago standard switches and mates are shownin the illustrations. These, generally speaking, havestood up better than the frogs and crossings, yet underheavy traffic cupping at the receiving end of the man-ganese piece, as well as at the heel of the tongue, wasquite pronounced. Where traffic was heavy through thebranch-off, the tongue indicates unusual wearing quali-ties. Where traffic was heavy along the straight track,cupping and cold rolling throughout the manganese piecewas quite evident. REPAIRING MANGANESE STEEL WITH ELECTRIC WELDER
. Electric railway journal . SE SWITCHES AND MATES The Chicago standard switches and mates are shownin the illustrations. These, generally speaking, havestood up better than the frogs and crossings, yet underheavy traffic cupping at the receiving end of the man-ganese piece, as well as at the heel of the tongue, wasquite pronounced. Where traffic was heavy through thebranch-off, the tongue indicates unusual wearing quali-ties. Where traffic was heavy along the straight track,cupping and cold rolling throughout the manganese piecewas quite evident. REPAIRING MANGANESE STEEL WITH ELECTRIC WELDER Another point which may be of interest in connectionwith solid manganese is the experience accompanyingattempts to repair it by electric welding. Tests havebeen made to build up broken points and cupped jointsin solid manganese steel special work in some cases withsatisfactory results, though in some others with fail-ures. Here again the peculiar characteristics of themetal make difficult the process of repair with an elec-. Chicago Special Work—Fig. 10—Showing Condition of Built-up Chicago Rail Crossing, Installed November, 1911; Traffic, 309 Wheels Per Hour 976 ELECTRIC RAILWAY JOURNAL [Vol. XLIII, No. 18.
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