.59

31.152 1.19

62.832 1.79

60.192
60.720 1.75
61.248 1.76 92.928 5.60
61.776 1.77 93.456 5.70
62.304 1.78 93.984 5.80 306.240

285.120

92.400 5.50

290.400

295.680

300.960

94.512 5.90 311.520

INDEX.

Abbreviations explained

Acres, roods, and perches in square feet, Table VI.

Adjustment and use of instruments

Angles of frogs, to find.

index, to find

intersection, to find

PAGE

....

to find radius, length, degree, apex distance, chord, mid-
ordinate, and external secant.

how to proceed when the P. C. is inaccessible

to shift the P. C. in order to strike a fixed tangent

to change radius from same P. C. in order to strike a fixed tan-
gent

.

how to proceed when the P. C. C. is inaccessible

to compound a curve in order to strike a fixed tangent

to shift a P. C. C. in order to strike a fixed tangent

summary of rules for

to compound into a tangent intersecting main curve on concave

side

102

to compound into a tangent intersecting main curve on convex
side

to shift a P. R. C. in order to strike a fixed tangent

to connect curves of contrary flexure by short tangents

to locate a Y from a tangent

to substitute a curve for a tangent connecting two curves

141, 142

. 52, 55
145, 146

89

.

103

104

Curves, miscellaneous

- - continued.

trackmen's table of curves and spring of rails
vertical curves, to calculate

to project

Datum in levelling

Decimals of an acre per 100 feet for various widths, Table IV.

Deflection angles and distances explained