INDEX. 
433 
of, with illustration, 10; surveying 
with, 76 
Piojeotion, choice of, for surveys with 
sextant and prismatic compass, 87 
Projections, map, 58-72 
Proportional logarithms, table, 392-406 ; 
explanation of table, 228 
Protractors, recommended, 5 
Rain gauge, 8 
Paper’s Practice of Navigation, 6; 
Paper’s rigorous method of clearing 
lunar distance, remarks and example, 
186-190 
Rate of watch, how to obtain, 160-163 
Reduction to the meridian, latitude by, 
sun example, 141-142 ; star example, 
144-145; table, 254; explanation of 
table, 221 ; reduction of the latitude, 
table, 425 ; explanation of table, 231 
Reeves, E. A., his method of finding the 
angles of immersion and emersion 
from the vertex of the moon applic¬ 
able to • Major Grant’s method of 
predicting an occupation, 180 
Refraction and curvature, to correct an 
angle of elevation of a peak, &c., for 
55; refraction, table of mean astro¬ 
nomical, 249; explanation, 220; rule 
for finding effect of, on distance visible 
at sea, 253 
Retardation table, 423; explanation of 
table, 230 
Right angle, to set off a, from any point 
on the ground by means of a rope, 53 
Right ascension of the sun, tables of, 
240-243 ; explanation of table, 219 
Rising and setting of sun, moon, and 
equatorial stars, table to find time of, 
251-252 ; explanation of table, 220 
River, measurement of the number of 
cubic feet of water conveyed by, in 
each second, 56 
Rough methods of measuring, 53 
Route surveying, general remarks on, 
VOL. I. 
75; route survey with prismatic 
compass, boiling-point thermometer 
and aneroid, description of, 77-80; 
weak points of, 80 ; map illustrating 
method of, 82; with sextant and 
prismatic compass, 88 
Ruins, survey of a plot of ground con¬ 
taining, 96 
Scale for plotting survey work, 79; 
suitable for surveys, 87 ; suitable for 
plane table survey, 109 
Scales of maps, note on, 73 
Scientific outfit, 2-8 
Scott, R., F.R.S., his table showing distri¬ 
bution of meteorological stations, 213 
Sea Horizon ( see Horizon) 
Semi-diurnal and semi-nocturnal arches, 
table of, showing the time of the 
rising and setting of the sun, moon, 
and equatorial stars, 251-252 ; ex¬ 
planation, 220 
Sepia, for mapping, 6 
Sextant recommended for regular work 
2 ; charge for testing at the National 
Physical Laboratory, 9; description 
of, with illustration, 15-17 ; adjust¬ 
ments of, 17-18 ; hints on the use of, 
in surveying, 83-86 ; table and rules 
for ascertaining heights and distances 
with, 84-86 ; diagram illustrating 
method of measuring angular distance 
between terrestrial objects with, 85; 
general remark on observations of 
heavenly bodies with, method of ob¬ 
taining accurate results, 137 ; how to 
obtain the index error of, 19; centering 
error should be ascertained, 19; small 
3-inch, for detached expeditions, 2; 
pocket or box, description and adjust¬ 
ments of with illustration, 20-22; 
observations with list of, 136 
Sextant stand, 23 
Shadwell’s cards of formulae, 6 
Sidereal time, described, 150 
2 F 
