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0436 The Pulse of Asia : vol.1
アジアの鼓動 : vol.1
The Pulse of Asia : vol.1 / 436 ページ(カラー画像)

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doi: 10.20676/00000233
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sounded the lake, it overflowed throughout the year, and
formed one of the most remote sources of the Tigris. Those
years, however, were a time of large rainfall, not only in
Turkey, but in the continental regions of the world as a
whole. In drier years, the lake is said to have no overflow
during the long rainless summer. In 1879, which was also a
time of comparatively abundant rainfall, Tozer records that
the water had recently begun to overflow. Nevertheless,
during most of the last century, the lake-level must have
been lower, for the natives are unanimous in saying that
previous to 1878 the water, sometimes at least, stood many
feet below the present strand. The impregnation of the clear
blue water with borax also indicates that in recent years
the lake has at some period been without an outlet. The
borax comes chiefly from large deposits about three miles
east of the lake. Its amount is not so great as to render the
water undrinkable, or even distasteful if one is thirsty; and
animals drink from the lake freely. Apparently, under the
present climatic conditions the lake is on the dividing line
between a so-called "normal" fresh-water lake with a per-
manent outlet, and a salt lake with no outlet.

In former times Lake Gyoljuk appears to have fluctuated
in size in the same fashion as the Caspian Sea and the dis-
tant lakes of Seyistan, Lop, and Turfan. The first historic
account of Gyoljuk is that of Ptolemy, in the second century
of our era. He calls it Lake Thospitis, apparently equivalent
to the name Dzopk, by which the Armenians still know it.
He merely says that it lies four degrees — actually three —
west of Lake Arsissa, the modern Van, and that the Tigris
River flows from it, which is exactly what a modern geo-