CHAP, vii.j DEEP-SEA TEMPERATURES. 313 



border of the cold area, temperature soundings were 

 taken mainly with a view to define its southern limit, 

 and they are sometimes on one side and sometimes on 

 the other. The general result is indicated on Plate 

 IV. by the southern border of the shaded space. Nos. 

 87 to 90 are once more in the warm area, the water 

 reaching a depth of upwards of 700 fathoms, but 

 maintaining, after the first 300 fathoms, a tempera- 

 ture of from 6 to 7 C. above that of corresponding 

 depths in the cold area. At Station 87, lat, 59 35' ]\ T ., 

 long. 9 11' W., with a depth of 767 fathoms, a serial 

 sounding, was taken, which contrasts remarkably 

 with the series at Station 64. The general result of 

 this sounding is represented dia grammatically by 

 Eig 56. The temperature was taken at every 100 

 fathoms after the first 200. 



Surface 11- 40. 



50 fathoms r V J 9 



100 p .%; 8 5 - 



150 ! . ^--'. 8 3 



200 ; j :. 8 2 



300 v ...'.. .jT.-^rs 8 1 



400 ...... ;~~V'T 7-8 



500 V. "'" '"" ? ' 3 



600 '-..;. .. .\ Q ; 6-1 



"^7 .'-. - . . . .'i^ic",:.::*, 5 1 



It will be seen by reference to the chart that two 

 nearly parallel series of soundings were taken, ex- 

 tending from the shallow water on the Scottish side 

 to the edge of the Fseroe Bank close to the western 

 opening of the Fseroe Channel, and that one of these 

 chains, including Stations 52, 53, 54, and 86, are in 

 the cold area, while the other chain of Stations, 48, 



