National Institute of Informatics - Digital Silk Road Project
Digital Archive of Toyo Bunko Rare Books

succeed in making their way to the Char-
chan river across the gravel glacis and the
belt, partly scrubby desert and partly bare
drift-sand, which stretches south of the river.
The small colony of Vāsh-shahri (C. 3),
Astronomically observed latitudes.
1906-08. Yol-sai, Camp 110 (C.4) ... ... ... 38° 20′ 2″
1913-15. Kizil-kum, Camp 14 (hill-station, 5128, on sand-ridge, N.E. of
Camp; B. 4) ... ... ... 38° 22′ 13″
Tatlik-bulak, Camp 19 (west end of base, rock near ravine; D. 3)... 38° 37′ 59″

NOTES ON SHEET No. 27 (KHĀDALIK)

The area surveyed in the N. W. corner
of this sheet is confined to spurs of the main
K'un-lun range, descending north of the
Charchan river gorge, and to a portion of
the gravel glacis near the gold pits of Khā-
dalik. For its delineation a number of
trigonometrically determined stations and
points from R. B. Lāl Singh's work of 1913
Astronomically observed latitudes.
1906-08. Kara-tāsh Sai, Camp 106 (A. 1) ... ... ... 37° 52′ 24″
1913-15. Khādalik, Camp 8 (A. 1) ... ... ... 37° 50′ 18″

NOTES ON SHEET No. 28 (TURFĀN)

The main routes passing through the
central and the south-western portion of this
sheet were surveyed in 1907. But most of
these were followed again in 1914-15, and
as much of the Turfān depression (B-D. 3)
was then surveyed in detail on the scale of
1 mile to the inch and much fresh ground
both to the north and south of it mapped,
the greatest portion of the work now shown
in this sheet belongs to the third expedition.
For the adjustment of the plane-table
work, the position of the 'Yangi-shahr' of
Turfān, falling near the centre of the sheet,
furnished a convenient base. The value
adopted for its longitude is 89°6′30″, this
being the approximate mean between the
value chronometrically observed by Mr.
Clementi (89° 6′ 3″) and that accepted in the
1906-08 map (89°7′). The longitude shown
in our map for the town of Lukchun,
89° 41′ 30″, receives welcome confirmation
from the value of 89° 42′ 28″ which
Roborovsky's astronomical observations indi-
cate for his meteorological station, established
close to that important town.
The latitude observation of 1907, as
shown below, agrees with Mr. Clementi's
within 22 seconds. The traverse along the
main road eastwards was adjusted on the
position adopted for Hāmi, and the traverse to

recently re-established near a site abandoned
for centuries, and Tatran (D. 2), an outly-
ing portion of the Charkhlik oasis, are the
only patches of permanently occupied ground
within the area comprised in this sheet.

were available, besides some peaks intersected
at the close of Rai Rām Singh's triangula-
tion of 1906 (see Appendix A, vol. 69 K).
Two latitude observations were also utilized.
The level assumed for the snow-line is
quite conjectural and probably far too low,
both surveyors having visited the ground
very late in the autumn.

the southwest on that of Korla. The shifting
to the west which the latter position has
under gone through erroneous adjustment of
R. B. Lāl Singh's triangulation in the Kuruk-
tāgh, as explained in group I of Major
Mason's Appendix A, has affected also the
positions of Singer (No. 29. B. 2) and
Āltmish-bulak (No. 29. D. 3) in the adjoin-
ing sheet, with corresponding discrepancies
in longitudes for the routes which from the
Turfān basin lead south to these two places.
In addition to the latitude observations
recorded below, several others taken by Mr.
Clementi on the main road and by Russian
explorers have also been used.
The details in the Turfān depression
have as far as possible been taken from the
one-inch survey carried out by M. Muhammad
Yakūb from December, 1914, to March,
1915. This extended over practically the
whole of the cultivated area of the Turfān
basin, from Yamshi in the west to Pichan
(No. 31. A. 3) in the east, and included a
great portion of the depression in the south
lying below sea-level. For this detailed
survey a base was measured near Kara-khōja
(C. 3), and the longitude of this place deduced
from that of Turfān 'New Town' (Yangi-
shahr).
One of the features which invest the