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Inches in decimals of a foot, Table IX.
Index angles, to determine
Instruments, adjustment and use of
Intersection angles of tangents, to find

desirable to fix on ground

PAGE 153 69 23 55 66

Level, to adjust .
Leveller, duties of .
Levelling, art of

by barometer and thermometer
correction for curvature and refraction
form for field-book
rules for exact work
rules for survey and location

suggestions concerning. Location, problems in field

admissible errors on ground
form of record for
projects, hints concerning
of terminal curves

of a Y. . Logarithms explained

multiplication by
division by
of numbers, to find

Table XII. .
roots and powers by
Logarithmic sines, tangents, &c., to find

table of, XIII.

24 83 26 29 28 27 27 28 83 94 81 81 84

88 103, 104, 106

3 5 6

179

13 197

85 82, 83

79

Maps, contour, utility of

notes for

not sufficient for intelligent projects Meridian, to establish

by equal shadows
by North Star

times of passage of North Star, Table I. Multiplication by logarithms

45 45 149

5

12 243, 256

41

Natural sines, tangents, &c., defined

Table XIV.
Needle, magnetic, to adjust

to re-magnetize.
hints as to management

bearings should always be noted North Star, to establish meridian by

times of meridian passage, Table I.
extreme elongations of, Table II.

44 82 45 149 150

[blocks in formation]

Rails, table of spring for trackmen
Radius of a curve, how to find

of a turnout curve
plain rule for, on curves

for narrow gauges
Radii and their logarithms, Tahle X.
Records, forms for
Refraction and curvature, correction for
Reversed curves. See Curves.
Rise per mile of various grades, Table XVII.
Rod, levelling

how to read.
Rodman, duties of
Roods and perches in decimals of an acre, Table IV.
Roots and powers of numbers by logarithms

143 52, 54, 56

129 133 134 155 81 28

317 28 42 83 151

7

Senior assistant, duties of

equipment for
Sines defined
Shadows, to fix true north by
Slopes for topography, Table XV
Slopeman, duties of
Slope stakes, to set

for earth excavation.
for embankment
for hillsides and rock

field record of work
Spring of rails, table for trackmen.
Squares, cubes, and roots of numbers, Table XI.
Supplement of an angle
Survey, form for record

to facilitate Switch-rails, angles of

tables of

80 81 12 44 315 84 30 31 33 35 34 143 161 12 81 82

130 135, 136

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2235.6 PAGE Tangent of a 1o curve, Table XVI.

269 to curve from a fixed point, how to locate

108 to two curves on the ground, how to locate

109 Tangential angles and distances explained

50 how to find

57, 58, 64 Thermometer, levelling by

29 Track problems

115 Trackmen's plain rules for finding frog distances

132, 133 tables of turnouts

135, 136 plain rules for laying off turnouts with tape-measure and pins 137 crossings on straight lines and on curves

139 elevation of outer rail

142 instructions how to put in missing stakes on curves with tapemeasure

144 table of curves and spring of rails

143 explanation of the trackmen's tables

144 how to find the degree of a curve .

145, 146 Transit, adjustment of

40 cross-hairs

24 Transitman, duties of

82 Triangles, solution of, two angles and a side given

16 two sides and an angle given

17 three sides given.

18 Triangles, right-angled, solution of

19 Trigonometry, plane.

12 general propositions

15 Turnouts. See Trackmen.

.

Vernier explained.

on transit Versed sines defined

to calculate

of a 1o curve, Table XVI. Vertical curves, to calculate

to project

43

12 54, 58 269 36 39

TABLES:

Ordinates of a lo curve
For locating terminal curves .
Tangents between curves of contrary flexure
Turnouts, switch-rails straight .

switch-rails curved
Elevation of outer rail on curves
Curves and spring of rails
1. Time of meridian passage of North Star

60 88 89 135 136 142 143 149

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