The Hydrography of the Faeroe- Shetland Channel 83 



lies on the east side of the channel, although close to the Shetlands 

 salinity falls again near the surface. This extraordinary distribution 

 seems to indicate that at an earlier date than that of the section, 

 probably in the previous winter, there had been a strong movement of 

 very salt water from the Norwegian stream and surface drift (a and b), 

 which from some external cause afterwards failed. Below 300 fathoms 

 the water, protected by the Wyville- Thomson ridge, remained 



Fig. 9. — Faeroe-Shetland Channel. Temperature and Salinity, May and 

 June, 1901. Yacht ' Walwin.' 



stationary, and was gradually cooled down to 0° C. by contact and 

 slight mixture with the water lying under it. Above 300 fathoms a 

 southward movement probably set in, lowering both temperature and 

 salinity, and this was followed, probably just before the date of the 

 section, by a re-establishment of the Norwegian stream (b) in full 

 force, the water being somewhat Salter, but the stream in almost the 

 same position as in 1893 (Fig. 7). 



The season 1901 is represented by two sections (Figs. 9 and 10) ; 

 the observations forming the first were made between May 14 and 



11—2 



