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tree at a height of 5,254 feet: and on the Koksunchen Snow 
Mountains (their east and western sides) at 5,692 feet. On 
the Snowy Mountains of Ulbinski to the Kreuzberge at Rid- 
dersk, where the Larch forms the boundary, these trees now 
cease at 5,500 Parisian feet, whilst their dry stems may be 
seen ata height of 6,187 feet. As to the grouping of the . 
different kinds of trees, the following remarks suggested 
themselves to my observation. Birch, Firs, and Pines are in 
the lower situations. The Birch (Betula alba) rises no higher 
than 4,536 feet on the Ridderschen Kreuzberge: on the east 
side of the Koksun Snow Mountains it ascends to an eleva- 
tion of 5,236 Parisian feet. Pines, which are seen on the 
sandy soil of the steppes, and are also common on the granite 
rocks among the mountains, seldom appear higher than 3,000 
Parisian feet above the sea. Firs, on the contrary, which I 
have not observed on the steppe between Barnaul and 
Schlangenberg, though very frequently while journeying 
westward from Barnaul, forming forests with Pine-trees, and 
which are very common likewise on the mountains, ascend 
to an elevation of 5,272 Parisian feet; although at 4,000 
feet they become more rare. Pinus sibirica grows with the 
two latter trees at the foot of the mountains, but still oftener 
along with P. Abies ; and at a height of 2,000 to 2,300 feet, —_ 
Very abundant. From 4,000 feet upwards, this species occurs in 
greater numbers as P, Abies disappears: and at 4,000 to 5,000 
feet it forms large and close forests. I have never observed 
tt beyond 5,272 feet; its limit being the same as that of 
the Fir. Ido not recollect having met with Larch cite 
below an elevation of 2,550 feet. Their highest boundary is 
on the Ridder Kreuzberge, 5,500 Parisian fect; at 4,000 feet 
they begin to form extensive woods, everywhere covering the 
north side of the mountains; as, for instance, the Cholsun, 
the Listwüga, and several others. Pinus Cembra first occurs 
at 4,000 feet; but it is never so numerous as to cover a -— = 
Country to the comparative exclusion of other trees. I have 
only heard of a forest of Cedars at Tschetschulicha, never 
ing seen it myself, which was stated to attain a greater 
elevation than any other tree here, even 6,541 Parisian feet. 
