SEA 



serrations of Phipps, Ross, Parry, Sabine, Saussure, Ellis, and Peron, 

 but this diminution is not subject to any regular law. At the depth of 

 100 fathoms the difference is sometimes no more than 1, and sometimes 

 as great as 20. Sometimes the coldness attains its maximum at 100 fa- 

 thoms, and sometimes it increases to 400 and 500. Hurnboldt thinks 

 that, on a mean, the change is about six times more rapid than in the 

 atmosphere, or about 1 in 50 feet; but the facts arc too anomalous to 

 be easily brought under any general rule. It is a remarkable fact that 

 in the Arctic or Greenland seas the temperature of the sea increases 

 with the depth. This singular result was tirst obtained by Mr Scoresby, 

 and has been confirmed by the later observations of Franklin, Beechft 

 and Fisher. 



The following are some of Mr Fisher's results obtained on board tlid 

 Dorothea : 



And similar results were obtained by Lieut. Beechy and Mr Scoresby. 



The greatest difference found by Lieut. Parry was at a depth of 246 

 fathoms ; and the greatest obtained by Capt. Sabine was 7| at a depth of 

 680 fathoms. 



SEAS POLAR. (Enc. Brit. Supp.) 



Short chronological notice of the principal navigators, who have ex- 

 plored thp Polar sea?, from the voyages of Davis to the present time, 

 with the highest latitude reached by each. 

 Year. NORTH. Highest Lai. \ 



1535 Davis, three voyages ~~~ 720. ];/ Davis Strait. 



1591 Barentz, three voyages 80. 11. Spitzbergen. 



1602 Weymouth ^^^.^.v^*^-^^. Resolution Island 



