. The road-master's assistant and section-master's guide: . JOYCES LEVER J^AKEYS VICTOR TRACK-DRILL. CHAPTER XIX. RULES AND TABLES. Curving Rails with Lever and Curving Hook—MethodOF finding approximately the Degree of Curvaturerequired to reach any desired object, Point ofCurve being Known—Practical Method of FindingProportion of Frog—Rules for Placing Frogs inCross-over Track where the two Tracks areStraight and Parallel—Tables for Elevation ofOuter Rail on Curves—Table for Determining De-gree of Curvature and Elevation of Outer Rail,BY Versed Sine of 43-FOOT Chords—Bills for Fr
. The road-master's assistant and section-master's guide: . JOYCES LEVER J^AKEYS VICTOR TRACK-DRILL. CHAPTER XIX. RULES AND TABLES. Curving Rails with Lever and Curving Hook—MethodOF finding approximately the Degree of Curvaturerequired to reach any desired object, Point ofCurve being Known—Practical Method of FindingProportion of Frog—Rules for Placing Frogs inCross-over Track where the two Tracks areStraight and Parallel—Tables for Elevation ofOuter Rail on Curves—Table for Determining De-gree of Curvature and Elevation of Outer Rail,BY Versed Sine of 43-FOOT Chords—Bills for Frogsand Switch Timbers. CURVING RAILS.^ • This is something not very well understood ;at least there seems to be no regular system fordoing it, and almost every track-man has a wayof his own. Some drop the rails on blocks;others place a block under each end of the railand have a gang of men stand on it to spring itdown while one of them pounds it from end toend with a heavy sledge. The amount ofdamage done to rails in this way is very great,especially to steel rails.
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Keywords: ., bo, bookcentury1800, bookdecade1870, bookidroadmastersassis00hunt
