The principal articles of its trade are rice and cotton, some sugar cane (nai shakar), flax (Katun) and hemp (Kanab) are also grown.
Such are the Chuya Alps, having an average altitude of 9000 f t., with summits from 11,500 to 12,000 ft., and at least ten glaciers on their northern slope; the Katun Alps, which have a mean elevation of about lo,000 ft.
The Katun valley begins as a wild gorge on the south-west slope of Byelukha; then, after a big bend, the river (400 m.
Long) pierces the Katun Alps, and enters a wider valley, lying at an altitude of from 2000 to 3500 ft., which it follows until it emerges from the Altai highlands to join the Biya in a most picturesque region.
The Katun and the Biya together form the Ob.
On the northern side of the range which separates the upper Bukhtarma from the upper Katun is the Katun glacier, which after two ice-falls widens out to 700-900 yards.
From a grotto in this glacier bursts tumultuously the Katun river.
From this lake issues the Biya, which joins the Katun at Biysk, and then meanders through the beautiful prairies of the north-west of the Altai.
And (1899) xxxv., and, by the same, Katun i yeya Istoki (Tomsk, 1901); S.