200 A. D. Bache on Gulf Stream Explorations. 
tions of the Gulf Stream, and furnish a sufficient guaranty that : 
the results have all the reliability which care, experience and 
zealous labor could give them 
Section No. 1, from Cape Florida to Bemini was run by Liew 
Commanding Craven, in May, 1855; Section No. 4, by Com 
mander Sands, in May, 1858; and Sections 2 and 3 by Lieut 
Commanding Craven, in April and May of the present year, — 
(1859). Sections 2, 3 and 4 are perpendicular to the direetion of 
the bottom are represented on diagrams 7, 8, 9 and 10. The 
Arabic numerals at the top represent distances from the Florida 
coast (the Keys) in miles, and the Roman numerals, the positions 
at which observations are made. ‘The numbers at the Jeft hand 
represent the depth in fathoms. gE Jig pay 
Commencing at the Cape Florida section, it will be seen t | 
there is a rapid descent of the bottom to the Havana section, 
from three hundred and fifty fathoms to eight hundred a 
or twenty-seven hundred feet in a distance of two hundred m! . 
The most shallow as well as the narrowest part of the joer 
therefore at Cape Florida. The deepest water fullows pete 
of Cuba and the Grand Banks, the depth being eight h | 
fathoms at a distance of only five miles from Havana, hie 
four hundred fathoms within five miles of Salt Key Ban ’ 
three hundred fathoms close to the island of Bemini. pin 
scent from the Florida side is for the most part gradual, but an 
the opposite side abrupt. This effect seems to have been P 
duced by the action of the sub-current in wearing a deeper oes 
shore, 
his 
to confirm the conclusion that the stronger current a8 ; it 
Stream makes the circuit of the Gulf of Mexico, Seo ee Tortugas 
pinged directly upon the island of Key west and pation 
we should find its effects in the wearing of a deeper ¢ 
that side. 
-water i8 
while on the side of the Tortugas and Key West the bata : 
Gal 
TEMPERATURES. 
the law of change of temperature with depth was dis¢ 
‘types of the curves representing the law were given 1) 
parts of the Stream. ‘The curves were all merely m 
. 
the Galf 
gave one form; the axis 
of amore general form. Thus, the cold water between then, 
Stream and the Coast cis of the Stes 
nel On 
_ Change of temperature with depth—In a former comm en) : 
ee Sere | oe ae ele en Oa hy 
