326 



Frits Johansen. 



^Vs 1908. 9 a. m.— 2 p. m. Depth 69 M. Thickness of ice over 

 2 M. Bottom grayish brown clay. 

 Surface: +0.22° С 

 2V2 M. + 0.07° (just below ice) 

 20 - +0.11° 



40 



50 



54 



55 



56 



57.5 



60 



68 



+ 0.29° 

 + 0.61° 

 + 0.86° 

 + 0.91° 

 + 1.11° 

 + 1.32° 

 + 1.53° 

 + 1.70° 



Salinity 0.15 



— 0.12 



— 5.0 



— 12.0 



— 13.0 



— 15.0 



water fresh 



water brackish 



water salt (sulphuretted hydrogen). 



12 p.m. Depth 117 M. Bottom as above. Thickness 



Temperatures in Centigrade. 



2^/5 1908. 7- 

 of ice 1,76 M. 

 Surface : + 0.0° 



2 M. + 0.0° 



10 - + 0.17° 



20 - + 0.26° i water fresh 



40 - + 0.43° 



50 - + 0.67° 



54 - + 0.93° 



55 - + 1.0° water brackish 



56 - + 1.18° 



57 - + 1.29° 

 60 - + 1.53° 

 70 - + 1.72° 



80 - + 1.93° (shghtly H ,8) 



90 - +2.12° (a little - ) 



100 - + 2.19° (distinctly - ) 



110 - + 2.32° (less marked - ) 



115=^/4- +2.36° (strongly ■ - ) 



N. B. It will be seen from these two tables, that the cold, fresh 

 surface water increases in warmth and salinity downwards. At 55 

 — 56 M. the bottom water begins to be noticed and contains more 

 H2S the further we descend. 



P. S. The taking of the three, difterent species of copepods from 

 Sælsoen and Annekssoen is very interesting, as they are (probably 

 all three) glacial marine relicts. 



We now turn to the smaller lakes (by comparison with Sæl- 

 søen and Annekssøen), which are scattered over the true coastal 



water salt 



