26 EXPLOEATIONS, WESTERN ATLANTIC, STEAMER BACHE, 1914. 



being practically no previous records for the niiddepths in this 

 region. The discovery that the general distribution of saHnity is the 

 same as that of temperature— i. e., highest west of Bermuda (except 

 on the immediate surface) — is a further corroboration of the upweUing 

 of abyssal water toward the Equator. 



THE STRAITS OF FLORIDA. 



The Straits of Florida are historic grounds for oceanographic study, 

 thanks to the tempejatures taken by the Blalce (Agassiz, 1888) and to 

 the numerous current measurements made by the United States Coast 

 and Geodetic Survey, especially by Capt. PiUsbury (1886, 1887, 1889). 

 However, it remained for the Bache to obtain satisfactory series of 



Temperature, Centigrade 

 4 5° B 7 8 9 10° 11 12 13 14 15° 16 17 18 19 20" 21 22 23 24 25* 



Meter 



100 



200 



300 



400 



500 



600 



700 



800 



900 

 1000 

 1100 

 1200 

 1300 

 1400 



Fig. 22.— Temperature sections on the line Key West-Habana; stations 10197, 10198, 10199, 10200, 10201; 

 and off Pensacola, Fla., March 13, 1885 ( ,A Ibatross). 



salinities, simultaneous with temperatures. Three profiles were 

 drawn across the Straits — one from Key West to Habana, one from 

 Cape Florida to Gun Cay (coinciding with the Blalce and \dth Pills- 

 bury's profiles) , and the third from off Jupiter Inlet to the northern 

 end of the Little Bahama Bank. 



Tlie Bache found a general rise in surface temperature, from north 

 to south, along the whole length of the channel, the water being warm- 

 est (24.70°) approximately 20 miles from Habana — i. e., in the posi- 

 tion of the axis of the Florida current at low dechnation of the moon. 

 The surface was cooler immediately off Key West than anywhere else 

 in the Straits (station 10197, 20.78°) with a slight but progressive 

 warming along the Florida coast from southwest to east and north. 



