A, 



i the expense of the Bergen Museum two sealers of 

 Tromsø, the captains H. Andresen and H. C. Johannesen, have 

 for some years collected samples of surface water on their expe- 

 ditions in the Arctic Ocean. Besides they have tåken some samples 

 of plankton, which have been examined by Mr. Jørgensen (B. 

 M. A. 1900) and myself. Mesrss. Barman and Mathiesen have 

 determined the salinity of water by titration according to the methods 

 given by prof. Otto Pettersson, and I have set up the results in 

 the following tables. The plates have been drawn by lieutenant 

 Larsen of the Bergen School of Navigation. 



