TEMPERATURE. 7 
along the shore of Finmark by the outlying islands. It 
then traverses the prefectures of Tromso and of Nordland 
on its way towards the interior of the country, about mid- 
way between the coast and the mountain chain of Kjoelen. 
In the prefecture of North Drontheim it bends further 
inland from the coast, so that the upper part only of the 
valley of Namdal and of the Findlider finds itself on the 
east. side—the coldest side of this line. Touching then 
the eastern frontier of the kingdom to the east of the 
lower part of Drontheim fiord, the line inclines toward 
the south-west, and encircles the Drontheim and Dovre 
fjelds. Thence it follows the line of the watershed of the 
Langefjeld, keeping in the same direction by places a 
little to the west, on to Giver-Telemark, the higher moun- 
tain of which it slightly grazes, Then it passes off, with a 
general direction towards the north-east, and almost in a 
straight line to the north of Lakes Kroederen and Speri- 
ten; cuts the Randsfiord and the Miosen a little to the 
south of the church of Elverm, ia Cisterdal, to pass on 
into Sweden towards the east. It eontinues its principal 
direction towards the north-east, until it crosses the Gulf 
of Bothnia at its contraction between the Umea, in 
Sweden, and Carlely, in Finland. 
In Norway this isothermal line comprises about 140,000 
square kilometres, having a population of about 190,000 
inhabitants, 
Around this isotherm of + 2° C. there group other iso- 
therms of a higher temperature. These succeed one 
another at short distances on the west side, but at much 
greater distances on the east side. On the north coast 
the colder air from the Arctic Ocean forces the isotherms 
to deviate a little more from each other on the two sides 
than they do further to the south. 
The isothermal line of 4° C., say 39° Fahr., follows the 
coast line from the prefecture of North Drontheim to the 
valley of Romsdal. It passes along thea within th coast, 
at a distance of from 3) to 40 kilometres. It bends 
