INDEX. 
429 
Date, to find a lost, 150 
Declination of the sun, tables of, 232- 
235; explanation of tables, 219 
Diagonal scale, how to construct, for map 
projection, 61 
Distance between two inaccessible peaks, 
how to obtain, 51 
Distance, measuring by pacing, 55; by 
sound, 55 
Distance of an inaccessible object, to find, 
by means of a measuring line, 53 
Distances, computation of, in tacheo- 
meter surveying, 112 
District survey, information on con¬ 
ducting, 91 
Double altitude, latitude by, 147 ; ex¬ 
ample, 148-149 
Drawing board, 5 
Drawing instruments recommended for 
travellers, 5 
Drawing pens, 6 
Eclipses of Jupiter’s satellites, longitude 
by, 202-203 
English statute miles and kilometres, 
comparison of, table, 266; explana¬ 
tion, 222 
English statute miles and Russian versts, 
table showing comparison of,. 267 ; 
explanation, 222 
Equal altitudes of star on different sides 
of meridian, to find error of watch by, 
example, 162 
Equal altitudes of star on different sides 
of meridian, to find error of watch by, 
example, 162 
Equal altitudes of sun, to find error of 
watch by, example, 163 
Equation of time, tables of, 236-239; 
explanation of tables, 219 
Error of compass by sun’s azimuth, to 
find, 208 
Error of watch, to find, by absolute alti¬ 
tudes, example, 153-154 
Examination of instruments at the Na¬ 
tional Physical Laboratory, Richmond, 
charges for testing various instruments 
there, 8 
Extemporary measurements, 53 
Feet, English, and metres, comparison 
of, table, 261-265 ; explanation, 222 
Fishing-line on reel useful for roughly 
measuring base, 3 
Flashing signals, 56 
Fortin’s barometer, carried by Mr. 
Whymper to great heights in the 
Andes, 7 
Frome’s “ Outline of a Trigonometrical 
Survey,” 91 
G alton, Francis, f.r.s., tables and 
examples given by him for determi¬ 
nation of heights by boiling-point 
thermometer and aneroid, 209-218 
Garo Hills, General Woodthorpe’s method 
of surveying in the, 109 
Geographical miles or minutes of the 
Equator contained in a degree of 
longitude under each parallel of lati¬ 
tude, with a compression of table, 
256 ; explanation, 222 
Geographical into statute miles, table for 
converting, 258 ; explanation, 222 
Grant, Major S. C. N., r.e., his approxi¬ 
mate method of predicting occupa¬ 
tions, with diagrams, 171-180 
graticules of maps, tables for construct¬ 
ing, 69-72 
Guyot’s meteorological tables, 7 ; tables 
for the determination of heights by 
boiling-point thermometer and baro¬ 
meter, 209-218 
Hand, length of the various joints of 
a man’s, 54 
Heights, trigonometrical formulae for the 
determination of, 50-51; ascertaining 
