70 FORESTRY OF NORWAY. 
ocean, and on the other side by that of the lofty moun- 
tain masses and chains of mountains, which follow the 
general direction of the shore. 
The central point of the lowest mean annual tempera- 
ture in the peninsula of Scandinavia is at a point inter- 
mediate between the Varanger fiord and the Gulf of 
Bothnia. There, as in Finnish Lapland, the mean annual 
temperature 1s as low as —3° = 26°6° Fahr. 
The yearly isotherm of —2° = 28-4° Fahr., include in 
Norway the south part of the parishes of Kautokeino and 
of Karasjok, in the interior of Finmark. Farther to the 
south, the miners’ village of Roros and its vicinity has 
also that mean temperature. 
The isotherm of 0° = 32° Fahr., passes to the north of 
the Bay of Varanger, embracing the whole of Varanger, 
and the whole interior of the prefecture of Finmark ; 
thence it curves towards the south-west, following gener- 
ally the chain of the Kjoelen to the prefecture of North 
Drontheim, comprising of the prefecture of Tromso only 
the most elevated mountain parts situated towards the 
Lake Altevard. From the boundary of Nordland and 
North Drontheim it bends to the east, enters Sweden, and 
finally directs itself by a slight turning towards the bottom 
of the Gulf of Bothnia, whence it goes on to the east in 
Russian Finland. Further to the south, the isotherm of 
0° = 32° Fahr., circumscribes in Southern Norway an oval 
Space, comprising the south-east portion of the prefecture 
of Sondre-Drontheim, the north part of the valley of 
Osterdal, so far as the northern extremity of the Lake 
Stromsjoe, in the valley of Rendal, and lastly, towards the 
west, the Alpine region of Rundane. 
Nearly 18 per cent. of the whole area of Norway has 
a mean annual temperature not exceeding 0°, or 32° Fahr., 
the freezing point of water. 
While the isotherm of 0° C., or 32° Fahr., encloses thus 
two separate portions of the country, the isotherm of + 2° 
C., say 36° Fahr., forms a single continuous line. It takes 
its rise to the north’ of the North Cape, and proceeds 
