INDEX. 
Page. 
Altitude, differences of, table for obtain- 
ing 269-284 
Arc into time, table for conversion of 108 
Astronomical constants 310 
Azimuths of Polaris at any hour angle, ex- 
planation of 24-27 
at any hour angle, table of 22-23 
at elongation, table of 21 
Center, reduction to, example of 11 
reduction to, figure and formula for 10 
reduction to, graphic 12 
Circular functions expressed in arc and 
time, five-place logarithm table of. 145-189 
Constants, table of 310 
Culminations of Polaris, table giving times 
of 18 
examples for computing times of 20 
Curvature and refraction, table of correc- 
tions for 2G8 
Ehmgations of Polaris, table of azimuth 
at 21 
table of times of 18 
Equivalents, convenient, table of 308-309 
Expansion, linear, of metals 310 
Feet to decimals of a mile, table for conver- 
sion of 112 
Feet to meters, table for conversion of 263 
Geodetic position computations, formulas 
and constants for 190 
inverse solution, example of 265 
logarithms of factors A, B, C, D, E, F, 
latitude 0°-72° 190-265 
Hour angle of Polaris 16 
Kilometers to statute miles, table for con- 
version of 263 
Logarithms of circular functions expressed 
in arc and time, five-place table 
of 145-189 
of natural numbers, five-place table 
of '. 123-144 
Longitude corrections, dilferenee in arc 
and sine, table of 264 
M, Logarithm of, for use in comj^iting 
spherial excess 266 
Mean tiiiu' into sidereal time, table lor con- 
\ersion of 110-111 
Meridian, method of fixing 16-17 
Metals, linear expansion of 310 
Meters, logarithms of, and miles, tal)le for 
interconversion of 296-308 
Meters to feet, table for conversion of 263 
Metric into United States measures, table 
for converting 294-295 
Mile, decimals of, into feet, table for con- 
version of 112 
Miles and logarithms of meters, table for 
interconversion of 296-308 
Page. 
Number, fractional change in, corrrespond- 
ing to a change in its logarithm . 123 
Numbers, natural, five-place logarithm 
table of 123-144 
Culminations of Polaris, examples for com- 
puting times of 20 
Physical constants 310 
Polaris, apparent altitude and azimuth of, 
at different hour angles 28-36 
aspects of, figure showing 16 
azimuths of, at any hour angle, explana- 
tion of table 24-27 
at any hour angle, table of 22-23 
at elongation, table of 21 
culminations of, examples for comput- 
ing times of 20 
culminations and elongations of, table 
of times 18 
hour angle of, definition 16 
Projection of maps of large areas, table of. . 37-48 
Projection of maps, scale 1:12,000, table of 
coordinates 8-5-93 
scale 1: 45,000, table of coordinates 77-84 
scale 1: 62, .500, table of coordinates 71-76 
scale 1: 63,360, table of coordinates .59-70 
scale 1: 125,000, table of coordinates 49-58 
Quadrilaterals 10' extent in latitude and 
longitude, areas of 103-107 
15' extent in latitude and longitude, 
areas of 96-102 
30' extent in latitude and longitude, 
areas of 94-96 
Reduction to center, example of 11 
figure and formula for 10 
graphic, explanation of 12 
Refraction, mean, table of 267 
Spherical excess, approximate, metliod of 
obtaining 12, 267 
Spherical excess, log. m. f(^r use in comput- 
ing 266 
Stadia readings, horizontal distances and 
elevations, table of 285-293 
Statute miles to kilometers, table for con- 
version of 263 
Three-point problem, computation of 14 
graphic solution of 15 
Time to arc, table for conversion of 109 
Time, local, method of obtaining 25 
Time, mean, table for conversion of, into 
sidereal 1 10-111 
Triangles, solution of, two sides and in- 
cluded angle given 12 
right-angled, rules for solution of 9 
United States measures to metric, table for 
conversion of 294-295 
Wheel revolutions to hundredths of a mile, 
table for conversion of 113-122 
311 
o 
