Long.), separating the government of Irkutsk from that of Transbaikalia, and has a length of 386 m.
Above the level of the Angara at Irkutsk (Zapiski Russ.
Attempts are being made to render the Angara navigable below Irkutsk down to the Yenisei.
Surveys in Asiatic Russia are conducted by the topographical departments organized at Orenburg, Tashkent, Omsk, Irkutsk and Tiflis.
They are named the Usinsk Mountains in West Sayan and the Tunka Alps in East Sayan; the latter, pierced by the Angara at Irkutsk, are in all probability continued north-east in the Baikal Mountains, which stretch from Irkutsk to Olkhon Island and the Svyatoi Nos peninsula of Lake Baikal, thus dividing the lake into two parts.?