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TABLE XVII.

RISE PER MILE OF VARIOUS GRADES.

[blocks in formation]

95.568

.01 .02 .03 .04 .05 .06

1.21 1.22 1.23 1.24

96.096 96.624 97.152

1.25

97.680

1.81 1.82 1.83 1.84 1.85 1.86 1.87 1.88 1.89 1.90 1.91 1.92

.08 .09 .10

•70 .71 .72 •73

.IT .12 .13 .14 .15

16 .17

888888888 RS. మహామం

32.208 32.736 33.264 33.792 34.320 34.848 35.376 35.904 36.432 36.960 37.488 38.016 38.544 39.072 39.600 40. 128 40.656 41.184 41.712 42.240 42.768 43.296 43.824 44.352 44.880 45.408 45.936 46.464

63.888 64.416 64.944 65.472 66.000 66.528 67.056 67-584 68.112 68.640 69.168 69.696 70.224 70.752 71.280 71.808 72.336 72.864 73.392 73.920 74.448 74.976 75.504 76.032 76.560 77.088 77.616

1.93 1.94 1.95

98.208 98.736 99.264 99.792 100.320 100.848 101.376 101.904 102.432 102.960 103.488 104.016 104.544 105.072 105.600 110.880 116.160 121.440

:13

1.96 1.97 1.98 1.99 2.00

.19

. 20

•528 1.056 1.584 2.II2 2.640 3.168 3.696 4.224 4.752 5.280 5.808 6.336 6.864 7.392 7.920 8.448 8.976 9.504 10.032 10.500 11.088 11.616 12.144 12.672 13.200 13.728 14.256 14.784 15.312 15.840 16.368 16.896 *17.424 17.952 18.480 19.008 19.536 20.064 20.592 21 20 21.648 22.176 22.704 23.232 23.760 24.288 24.816 25.344 25.872

.21

126.720

.22 .23 .24 .25 .26 .27 .28 .29 •30 .31

.79 .80 .81 .82 .83 .84 .85 .86 .87 .88 .89 .90 .91 .92 .93 .94 .95 .96 .97

[blocks in formation]

• 32

1.26 1.27 1.28 1.29 1.30 1.31 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.40 1.41 1.42 1.43 1.44 1.45 1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53 1.54 1.55 1.56 1.57 1.58 1.59 1.60 1.61 1.62 1.63 1.64 1.65 1.66 1.67 1.68 1.69 1.70 1.71 1.72 1.73 1.74 1.75 1.76 1.77 1.78 1.79

• 33 • 34 •35 .36 . 37 .38

3.60

132.000 137.280 142.560 147.840 153.120 158.400 163.680 168.960 174.240 179.520 184.800 190.080 195.360 200.640 205.920 211.200 216.480 221.760 227.040 232.320

.98

[blocks in formation]

80.256 80.784 81.312 81.840 82.368 82.896 83.424 83.952 84.480 85.008 85.536 86.064 86.592 87.120 87.648 88.176

47.520 48.048 48.576 49.104 49.632 50.160 50.688 51.216 51.744 52.272 52.800 53.328 53.856 54.384 54.912 55.440 55.968 56.496 57.024 57.552 58.080 58.608 59.136 59.664

.40

[blocks in formation]

3.70 3.80 3.90 4.00 4.10 4.20 4.30 4.40 4.50 4.60 4.70

.43 .44 .45 .46 .47 .48 .49 • 50

237.600 242.880

88.704

4.80

26.400

[blocks in formation]

248.160 253.440 258.720 264.000 269.280 274.560 279.840 285.120 290.400

4.90 5.00 5.10 5.20 5.30 5.40 5.50

28.512

89.232 89.760 90.288 90.816 91.344 91.872 92.400 92.928 93.456 93.984 94.512

[blocks in formation]

.56

61.248 61.776

5.60

29.040 29.568 30.096 30.624 31.152

295.680

.57 .58

5.70

62.304

5.80

300.960 306.240 311.520

.59

62.832

5.90

INDEX.

PAGE

ix
152

23
129
69
55
12
43
50
130

Abbreviatiuns explained i
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
plane
to read on verniers
tangential and deflection

of switch-rails .
Apex distance of curves, to find
Arc, functions of, to find
Arithmetical complement
Axemen, duties of
Azimuths of North Star, Table III.

.

52

13

6
84
150

Barometer, levelling by.
Bench-marks, proper intervals for
Bubble, to adjust on level

to adjust on transit

29
83
25
40

.

.

Chain, to lay out curves with
Chainman, duties of
Chief engineer, duties of
Chords, to calculate

Table XV.
Circle, propositions concerning .
Circular arcs to radius of 1, Table VII.
Complement of an angle

arithmetical.
Compound curves. See Curves.
Contour maps, utility of
Correction for curvature and refraction in levelling
Cosines defined .
Crossings, plain rules for laying off
Cross-hairs, to adjust

eccentricity of .
to put in new

63
82

79
. 54, 58

269

49
152
12
6

85
28
12

139
24, 26, 40

24
44

319

.

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52, 56

.

.

PAGE
Cross-sectioning. See Slope stakes.
Cubes and cube roots of numbers, Table XI.

161
Curves, circular, on railroad defined .

51
to find radius, length, degree, apex distance, chord, versed sine,

and external secant
form for field notes

70
Curves, how to lay out on the ground,
with the chain only

63
with transit and chain

66
hints as to field-work

82
protractor for

84
slackening grade on

87
terminal

88
Curves, simple, location of,
how to proceed when the P. C. is inaccessible

93
to shift the P. C. in order to strike a fixed tangent

96
to change radius from same P. C. in order to strike a fixed tan.
gent :

97
to triangulate on .

94
to pass through a fixed point

127, 128
Curves, compound,
how to proceed when the P. C. C. is inaccessible

95
to compound a curve in order to strike a fixed tangent

98
to shift a P. C. C. in order to strike a fixed tangent

99
summary of rules for

101
to compound into a tangent intersecting main curve on concave
side

102
to compound into a tangent intersecting main curve on convex
side

103
Curves, reversed,
parallel tangents, radii equal

115
parallel tangents, radii unequal

117
angles unequal, radii equal

119
angles unequal, tangent points fixed, radii equal

120
divergent tangents, radii equal, advancing towards intersection 123
receding from intersection

124
to shift a P. R. C. in order to strike a fixed tangent

125
Curves, miscellaneous, -
elevation of outer rail

141, 142
degree of, to find by calculation

. 52, 55
to find on ground

145, 146
to connect curves of contrary flexure by short tangents

89
to locate a Y from a tangent

103
from a convex curve

104
from a concave curve

106
to locate a tangent to a curve from a fixed point

108
to two curves already located

109
to substitute a curve for a tangent connecting two curves

109

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