Text Appearing Before Image: Heavy Consolidation for the Lake Superior & Ishpeming with sloping roof, throat and backhead. The center line isplaced 10 ft. 4 in. above the rail, and by sloping the mudring toward the front there is room for a throat 19 9/16 in.deep. The furnace contains a Security sectional arch, sup-ported on four water tubes. The dome is of pressed steel. total equivalent heating surface, assuming each square footof superheating surface as equivalent to 1 j sq. ft. of evap-orative heating surface, is 4,909 sq. ft. The cylinders and steam chests are lined with bushingsof Hunt-Spiller gun iron, and the same material is used for 343 344 RAILWAY MECHANICAL EXGIXEER Vol. 90, Xo. 7 Text Appearing After Image: kLY, 1916 RAILWAY MECHANICAL ENGINEER 345 the piston and valve packing rim,-. The Nathan automatic vacuum breaker is applied. The valve motion is of theBaker type, and the gears are controlled by the Ragonnetpower reverse mechanism which in thi> case can l>e operated by either compressed air or steam. The valve motion bearerssupported on the guide yoke. The crosshead link is at-tached directly to the crosshead wrist pin. thus saving weightand simplifying the design. Each main frame is cast in one piece with a single frontrail, and has a width throughout of 5 ! j in. The transverseframe braces include a large steel casting which support- thefront end of the firebox, and is extended forward to bracethe main driving pedestals. The brake cylinders are sup-ported on the main frames, just forward of the leading driv-ing pedestals. The brake shaft is fulcrumed on two steelcastings which are bolted to the frames under the cylindersaddle. These castings also serve to support the engine t
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