Raymond, William Galt, 1859-1926, Raymond, William Galt, 1859-1926. cre · New York, J. Wiley & sons, inc · leaf 109
al halfthe co-tangent of half thefrog angle. Some makersuse the length along thegauge side, in which casethe number equals half theco-secant of half the frogangle. Expressed as equa-tions, n=^ cot I F, Fig. 36 w = i cosec There arc many patterns of frogs and switches and devices foroperating them,… … Set for Siding Fig. 37 Set for Main Line
Railroad engineering
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