IIIFカラー高解像度
国立情報学研究所 - ディジタル・シルクロード・プロジェクト
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| IIIFカラー高解像度 |
| Southern Tibet : vol.2 | |
| 南チベット : vol.2 |
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引用情報
2S6 EUROPEAN SPECULATION BEFORE RI'DER'S SURVEY.
birth to these feeders. This range passes eastward from forty to seventy miles north of the general line of our river, and in the main forms the southern watershed of the great lake plateau. However, recent exploration shows that, in the case of several of the great northern feeders of the Tåmchhok, in the first and second sections, they rise further north still than the Gang-dis-ri range, and even on the lake-plateau itself. They pass through gorges between lofty peaks in this range, much
as do the Indian rivers in their course through the Southern Himalayas. We interpolate these remarks here, because the Chhorta Tsangpo, which bounds our Second
section (from Chhorta to Shigatse) is one of the great feeders, whose early course has been traced back north beyond the Gang-dis-ri range; its primary sources being found in certain lakes to the S.W. and S. of Dangra Yum T'so.»
I should have inserted this passage after Ryder, but as Sandberg has not at all used Ryder's authority, it rather belongs to mere speculation. He concludes that
the considerable volume of the northern tributaries prove a long course. Therefore
he removes the northern watershed to the north. Thus »the massive mountain-range» situated here, should most likely be regarded as the watershed. But that has been
found not to be the case. It would be interesting to know which »recent explora-
tion» has followed the northern tributaries up on the lake-plateau itself! I had not yet begun my journey when Sandberg wrote, and Ryder had arrived at the opposite
conclusion to Sandberg's »recent exploration». In reality not one of the northern tributaries comes from the lake-plateau. And who had, in 1905, traced the early course of the Chaktak-tsangpo back north beyond the Gang-dis-ri ? Sandberg's description of this part of Tibet is mere fiction. If he had said old instead of recent exploration, one would have thought of the Lamas and of the Ta-ch'ing map. Probably he has got his impressions from Saunders' map, which, for this part of Tibet, is also mere fiction.
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