CONTENTS. 
PART I. 
PAGE 
Instruments used for Astronomical Observations . . . 1-45 
Preliminary Remarks ........ 1 
1. Scientific Outfit ......... 2-9 
General List, 2—Instruments requisite for Detailed Surveys, 7—Ex¬ 
amination of Instruments, 8—Packing, 9. 
2. Instruments and their Adjustments ...... 10-45 
Compasses, 10—Hypsometrical Apparatus, 12—Aneroids, 14—Sex¬ 
tant, 15—Adjustments of the Sextant, 17—To find Index Error of 
Sextant, 19—Box or Pocket Sextant, 20—The Artificial Horizon, 22 
—Sextant Stand, 23—Transit Theodolite, 23—Adjustments of the 
Theodolite, 26—Level Error, 34—Tacheometer and Measuring Staves, 
35—Plane Table, 36—Watches, 43. 
* PART II. 
Plane Trigonometry, Preliminary Remarks and Map Pro¬ 
jections . . 46-74 
Trigonometrical Formulae and Examples of the Application of Plane 
Trigonometry to Surveying, 46—To find the Meridian by a Watch, 
51—To find the Meridian by the Sun without Instruments, 52— 
Extemporary Measurements: Rough Methods of Measuring', 53 
—Distance by Sound, 55—Ascertaining Heights by Angles of Ele¬ 
vation, 55—Flashing Signals, 57—Map Projections, 58—Tables for 
the construction of Map Projections, 59, 60, 67-72—Scales of 
Maps, 73. 
