it flows E.N.E as far as Yakutsk (62° N., 127° 40' E.), where it enters the lowlands, after being joined by the Olekma, also from the right.
From Yakutsk it goes N.
They built small vessels at Yakutsk on the Lena, 900 m.
In illustration of the very slow diffusion of heat in the solid crust of the earth, and as affording a further indication of the climate of northern Asia, reference may here be made to the frozen soil of Siberia, in the vicinity of Yakutsk.
The total yield annually amounts to some 700,000 oz., the largest quantity coming from the Olekminsk, district in the province of Yakutsk, and this district is followed by the Amur region, the Maritime province, and Nerchinsk and Transbaikalia.