INDEX. 
434 
Sines, cosines, tangents, cotangents, 
secants and cosecants, table, 302-391 : 
explanation, 224-228 
Solidity of a cylinder, to compute the, 
282 
Sound, measuring distance by rate it 
travels, 55 
Span, angle subtended by the, 53 
Spherical trigonometry, formula for 
computing difference of longitude 
from azimuths, 91 
Staff used for tacheometer surveying, 111 
Star, to find time of meridian passage of 
a, 140; to find the longitude by 
chronometer from altitude of, example, 
157 ; latitude by meridian altitude of, 
example, 140-141 ; to find error of 
watch by equal altitudes of a, ex¬ 
amples, 162-163 
Star maps in pocket at end of volume 
Stars, table giving mean places of fifty 
of the principal, 244-245 ; explanation, 
219 
Stationery for travellers, 5 
Statute into geographical miles, table for 
converting, 257 ; explanation, 222 
Staves used for measuring distances 
with tacheometer, description and 
illustration of Indian survey pattern, 
38, 114; of ordinary pattern, 39 
Steel tape, 3 
San, in tropics, meridian altitude of, at 
times too great to be observed with 
sextant and artificial horizon, 151; 
to find the longitude by chronometer 
from altitudes of, example, 155-156 ; 
to find error of watch by equal 
altitudes of the, example, 160; tables 
of the declination of the, 232-235 ; 
explanation of table, 219 
Survey of small tract of country, how to 
conduct, 95 ; with sextant and pris¬ 
matic compass, article by Gen. Sir 
C. W. Wilson, r.e., .k.C.b., 87-97 
Surveying, part iii. of work dealing 
with, 75-134; surveying with pris¬ 
matic compass, &c., 76-80, with 
sextant, 83-86; Gen. Sir C. W. 
Wilson’s article on, 87-97; Gen. 
Woodthorpe’s article on surveying 
through jungle, &c., 109 ; plane table 
surveying, 97-105 ; with tacheometer, 
111-113; Col. Tanner’s note on bar- 
subtense survey, 113-116 ; with theo¬ 
dolite, 116-123; photographic survey¬ 
ing, article by J. Bridges Lee, 123- 
132 ; by latitudes and azimuths, note 
with plan, 132-134 
Symbols recommended to be adopted in 
surveying, 97 
Tables : linear value in miles of a de¬ 
gree of arc, measured along parallels 
of latitude, 67; for ascertaining heights 
and distances with a sextant, 84 ; for 
the construction of graticules of maps, 
67 ; meridional parts, 59; for con¬ 
structing graticules of maps, 67 ; for 
computing heights by boiling-point 
and aneroid, 210-218 
I. Declination of the sun, 232-235 ; 
explanation, 219 
II. Equation of time, 236-239; ex¬ 
planation, 219 
III Right ascension of the sun, 240- 
243; explanation, 219 
IV. Mean places of fifty of the prin¬ 
cipal stars, 244-245; explanation, 219 
V. Meridian passage of stars on the 
first day of the month, 246-247 ; ex¬ 
planation, 220 
VI. Correction for the day of the 
month to be subtracted from the ap¬ 
parent time of a star’s meridian 
passage on the first day of the month, 
278; explanation, 220 
VII. Mean astronomical refraction, 
249; explanation, 220 
VIII. Semi-diurnal and semi - noc¬ 
turnal arches, 251-252 ; explanation, 
220 
