TEMPERATURES. 227 
fathoms), or to that of 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 
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a depth of 50 fathoms a temperature higher by 23° than off 
Barbados ; at 100 fathoms it is 83° higher, at 150 fathoms 7^, 
at 200 fathoms 83°, at 300 fathoms 4°, at 400 fathoms 13°; 
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 Noronha. 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 
Vertical cate fathoms 
Fig. 152. 
