320 CAV. W. p. JERVI8, F.G.S., ON THALASSOGRAPHICAL AND 



deep; further down the soundings reaeh 47 fathoms, then 

 i<7, and afterwards 118 fathoms, even below the junction of 

 the Drammen fjord from the west, which has a similar 

 depth. Near Tonsberg the depth is 230 fathoms, Avhich is 

 the same as that at the point where the Christiania fjord 

 enters Bohns Bay. at 55 miles below the capital. Beyond 

 this, however, the central channel of the submerged fjord 

 is closely bounded on either side by depths of 50 to 60 

 fathoms, notwithstanding the evidence that the sea current 

 has considerably tilled up the original central channel, 

 preventing the progress of the detritus to any great 

 distance. 



Langesund fjord. Lat. 59° N. — Some remarkable facts can 

 be observed near the entrance of the great Frier fjord, 

 which originates in grand mountains (\000 feet high, that is, 

 where it discharges itself into Bohns Bay, and after having 

 assumed the name of Langesund fjord, in honour of the town 

 it passes. Though the depth of the fjord below Brevik is 

 only 180 fathoms, for upwards of 10 miles out to sea we 

 can clearly trace the central channel of the magnificent 

 submerged fjord, many miles in width, with soundings giving 

 205 fathoms, while on either side they do not reach that 

 amount by 100 fathoms. The line of 100 fathom soundings 

 approaches to within two miles of the mainland. 



Proceeding westward for 100 miles, from Langesund to 

 Ekersund, the bathometrical curve of 100 fathoms follows 

 the present line of coast of Norway with considerable 

 regularity at a distance of 10 miles. 



From Ekersvmd nearly to the 61st parallel of latitude — 

 120 miles — the 100 fathoms isobath runs within a distance 

 of from one or two to 11 miles from land. 



Lister fjord. With its tributaries the Fedde fjord and the 

 Flehke fjord, near the town of Flekkcljord. Lat. 58^ 15'. — 

 At the mouth of the Lister fjord a deep submarine channel 

 is traceable for 5 miles to sea, indicating the original course 

 of the fjord, so that the 100 fathom soundings approach to 

 within a short distance of the coast on either side, and run 

 up the present fjord for another 5 miles, where they hug the 

 precipitous rocks. The submerged fjord commences at once 

 Avitli a depth of 120 fathoms, gradually increasing to 205 

 fathoms. The sea bottom invariably consists of slik. 



Stavanger fjord. Lat. 59° N., Long. 5"* 40' E. — Near Sfavan- 

 gcr there is a ftimily party of secondary fjords, parti}' caused 

 by the submergence of the land having giA'cn origin to 



