National Institute of Informatics - Digital Silk Road Project
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Report of a Mission to Yarkund in 1873 : vol.1 |
( 287 )
The final positions in longitude of Yarkand and other important places have been determined as follows :--
The true longitude of KASHGHAR (Yangi-Shahr) is ... 76° 6' 47"
The difference of longitude between Kashghar and
Yangi-Hissar as determined by Pandit Kishen Sing's pacing, corrected from latitude observations, is—On
outward journey • ..
On return journey ... ...
Giving for longitude of Yangi-Hissar
The difference of longitude between Yangi-Hissar and Yarkand, determined in the same manner—
By outward journey is ... ...
By return journey
On the outward journey the survey was carried along the direct road, about 75 miles in length, and over a perfectly level country, whereas on the return journey the road followed a circuitous line of 180 miles, over one snowy pass and very rough ground. The first
value is therefore accepted in preference, viz. ...
| -}- 0° 6' 15" 1° 3' 0" 1° 4' 25" |
| -I- 0° 6' 0, }mean 6' 8" + 6' 8" |
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| 76° 12' 55" |
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10 3' 0"
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The mean result obtained chronometrically is adopted for the final position. The wonderfully accordant results at Kila Panjah, although highly satisfactory, must perhaps to a certain extent be regarded as fortuitous, but the admirable rates obtained for the watch employed in the chronometric determinations, a silver lever watch by Brock of London specially made for explorations, are worth recording* and ought to give results in the accuracy of which great confidence may be placed.
* Travelling rates obtained by Captain Trotter for Brock's lever watch, No. 1602, during journey from Yangi-Hissar to Kila Panjah, and return journey to Yarkand.
* Travelling rates obtained by Captain Trotter for Brock's lever watch, No. 1602, during journey from Yangi-Hissar to Kila Panjah, and return journey to Yarkand.
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| No. of days Rate per STS(iE. Dates. rate was ing in REMARKS. determined. seconds of No. of days Rate per STS(iE. Dates. rate was ing in REMARKS. determined. seconds of | from which diem gain- time. from which diem gain- time. |
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ghan. ghan. ghan. |
| Ak-tala to Tashkur- 22nd to 31st March 9 -I- 6. 1 (2) Ditto Ditto. Ak-tala to Tashkur- 22nd to 31st March 9 -I- 6. 1 (2) Ditto Ditto. Ak-tala to Tashkur- 22nd to 31st March 9 -I- 6. 1 (2) Ditto Ditto. | Yangi-Hissar to Ak- 18th to 22nd March 4 -I- 6. 0 (1) Rate obtained by comparing difference tala. of observed times with difference of longitude as Yangi-Hissar to Ak- 18th to 22nd March 4 -I- 6. 0 (1) Rate obtained by comparing difference tala. of observed times with difference of longitude as tala. of observed times with difference of longitude as | derived from Pandit's pacing, corrected for latitude. derived from Pandit's pacing, corrected for March 4 -I- 6. 0 (1) Rate obtained by comparing difference derived from Pandit's pacing, corrected for |
| 72° 44' 18" |
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| 72° 46' 40" |
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| 72° 45' 29" |
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| 72° 45' 30° |
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| 72° 44' 10' |
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On outward journey, from Tashkurghan ...
On return journey, from Ighiz-yar (near to and con-
nected with Yangi-Hissar by a traverse survey)...
Giving a final longitude for KILA PANJAH of... Whilst the observations for absolute longitude at the
same place give a result of . ...
and a fourth entirely independent result obtained by Captain Trotter's route survey, corrected for latitude is
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