88 FORESTRY OF NORWAY. 



dais fjeld and the Halliugsdal fjeld, with a length of 186 

 kilometres, and a basin of 5230 square kilometres. In 

 itself the l)ramselv has a length of 263 kilometres, and a 

 basin of 1 6,890 square kilometres. 



The rivers of Finmark, the Altenelv and Tanaelv the 

 latter of which is, after the Glommen and the Dramselv, 

 the third greatest river in Norway do not themselves 

 expand into lakes, but they receive affluents from a great 

 many small lakes, and they pass through some others. 

 The river Patsjoka is the flow to Varanger fiord of the 

 great lake Enare, measuring 2530 square kilometres, 

 situated in Finnish Lapland at an altitude of 250 metres. 



In my account of my visit to Christiansand mention is 

 made of the Toppdal river, and the Torristal, or Otterdale 

 river. 



Of the Topdalselv, debouching to the east of Chris- 

 tiansand, it is stated that it is the discharge of the eastern 

 part of the mountains of Saetersdal, and has a length of 

 136 kilometres, with a basin of 1,900 square kilometres. 



Of the Otterelv, the river I visited, and which debouches 

 into the western part of Christiansand, he states that it 

 flows from the midst of the mountains of the Ssetersdal, 

 receiving affluents from the Byklefjeld, the most southern 

 part of the Langfjeld, and that it has a length of 226 

 kilometres, with a basin of 3,660 square kilometres. 



Of the waterfalls in Norway mention has been made 

 again and again in preceding chapters. Of such the most 

 remarkable, on account of the quantity of water, and at 

 the same time, the most important, in consequence of its 

 proximity to the sea, is the Sarpfoss, formed by the Glom- 

 men near its embouchure. The flow of this mass of water 

 varies from 100 to 150 cubic metres per second in winter, 

 and from 2000 to 3000 cubic metres per second when the 

 river is in flood ; and some years it has amounted to 4000 

 cubic metres. The mean flow may be estimated at 800 

 cubic metres per second. The perpendicular height of 

 the fall of Sarpfoss is 21 metres. 



