Account of the Operations of the Great Trigonometrical Survey of India ...

Front Cover
Printed at the office of the Trigonometrical branch, Survey of India, 1883 - Geodesy
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Contents

Programme of Operations and System of Working during Seasons 187576 187677 and 188081
16
Connection of the Longitude Stations with the Triangulation of the Survey
17
The Systems on which the Observations were taken
18
Programme of each Nights Work ib 5 Electric Signals between the Stations
19
The Electrical Arrangements of the Observatories
20
Precautions Introduced
21
Improvement of Arrangements
22
Programme for Season 188081
23
Connection of the Longitude Stations with the Triangulation of the Survey
24
System of Observations and Nightly Programme
25
Clocks used as Invariable Pendulums
26
Relations with the Officers of the Telegraph Department
28
Reduction of the Observations 80
30
Remarks on the Results Obtained 81
31
Personal Equation 1 Importance of the Equation
32
Recognition of two Distinct Equations according to the Direction of Motion of the Object Observed
33
Influence of Differences between the two Transit Telescopes
34
Personal Equation in transcribing the Chronographie Records ib 9 Description of the Idiometer
35
Faults found and remedied
37
Final Remarks 88
38
Detailed Description of the Methods of Observing and Reducing the Results with full Explana tions of the Tables 1 Introductory
39
Determination of Collimation
40
Diurnal Aberration
41
Determination of Deviation or Error in Azimuth
42
Explanation of Table IIDeduction of Deviation Correction from Star Observations
43
Explanation of Table IIIReduction of ComparativeAzimuth Star Observations
44
Explanation of Table IVDeduction of a the Final Value of Deviation Correction
45
Reduction of Comparisons of Clocks by Longitude Signals
48
Deduction of the Difference of Longitude AL and the Retardation of Signals p from
56
Explanation of Table I 2
2
Assignment of the Weights of Azimuth Observations in Tables II and III
11
For Arc MadrasBolarum
90
Do do do for AdenSuez 93
93
For Arc MadrasBellary
99
For Arc BangaloreBellary
105
Observations of Transits with E Clock and Deduction of the Apparent Difference of Longitudes
113
For Arc VizagapatamBellary
123
For Arc MangaloreBombay
133
Deduction of Clock Rate Corrections from the Observations of Transits
138
Deduction of the Difference of Longitude Ah from Observations of Transits with Local Clocks
141
Deduction of the Difference of Longitude Д L and the Retardation of Signals p from
145
Deduction of Deviation Correction ay from Star Observations 15
163
Abstract of Observed Values of the Absolute N S Equations of Lieut Colonel Campbell
169
Observations of Transits with W Clock and Deduction of the Apparent Difference of Longi
176
For Arc DeesaKurrachee
185
For Arc BombayKurrachee
193
For Arc JubbulporeBombay
201
For Arc JubbulporeBolarum
210
For Arc Jubbul poreAgra
219
For Arc JubbulporeDeesa
229
For Arc AgraDees a
235
Deduction of Clock Rate Corrections from the Observations of Transits
243
Determination of the Geodetic Elements of Longitude Stations
251
Table B Triangulation for the Connection of Longitude Stations Geodetic Latitudes Longitudes
257
PART II
263
Detailed Description of the Method of reducing the Observations with full Explanations of
273
Table VIII Observations of Transits with Local Clocks and Deduction of the Corrected Dif
279
Deduction of the Difference of Longitude AL from the Determination of Local Clock
4
Do do do for AdenSuez 105
105
Right Ascensions of Clock Stars
112
BOMBAYADENSUEZ BY SUBMARINE CABLES ABSTBACT OF THE OBSERVATIONS AND REDUCTION
132

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