TEMPEKATUKES. 



227 



fathoms), or to that o£ 39° at a depth of 1,297 fathoms in the 

 passage between Jamaica and San Domingo. Judging from 

 the few bottom temperatures obtained between the Formigas 

 Bank and Jamaica, the water of that section is slightly warmer, 

 a temperature of 39° being obtained at a depth of 1,140 fath- 

 oms. 



The bottom temperatures taken off Barbados, from 56 to 713 

 fathoms, on the southern and western sides of the island, show 

 a remarkable diminution in temperature, as contrasted with the 

 same depths of the serial line off Sombrero. There we have at 



2 §S 





SaatiaTp cie Cuba 



'IMoiaut Pi. Jamaica 



Fig-. 152. 



a depth of 50 fathoms a temperature higher by 2i° than off 

 Barbados ; at 100 fathoms it is 8h° higher, at 150 fathoms 7°, 

 at 200 fathoms 81°, at 300 fathoms 4°, at 400 fathoms li°; 

 and finally at 700 fathoms the temperatures become identical, 

 40°. The temperature lines off Sombrero were taken at the 

 end of March, and those off Barbados at the beginning of 

 March of the same year. These results agree with the tem- 

 peratures taken to the southward by the " Challenger," between 

 Pernambuco and Fernando Norouha. Near the last-named place 

 the temperature falls to 60° at a depth of 50 fathoms ; off Bar- 

 bados the same temperature occurs at 82 fathoms. At 100 

 fathoms the temperature is 55° ; it is the same at 150 fathoms off 



