have as usual the isotherms crowding upwards ; the
cooler water rising to supply the place of the hot
surface-water, Avhich is heing rapidly drifted and
evaporated away.
We sounded on the 10th in 2,300 fathoms with a
bottom of ‘ globigerina-ooze,’ and took a series of
temperatures at intervals of 100 fathoms, doAvn
to 1,500. The surface-temperature was high, and
from the surface the temperature fell Avith unusual
rapidity, losing nearly 15° C. in the first hundred
fathoms.
Surfiice . .
5 fathoms .
10 „
26°’ 1C.
25 • 4
24 • 4
15 fatlioms
20 „ .
100 „ .
20 • 5C.
18 • 4
11 • 3
There Avas a marked tendency at this station
to the gathering together upwards of all the higher
lines (PL XIX.), the isotherm of 6° C. occurring at
a depth of four hundred fathoms, nearly four hundred
fathoms higher than the position of the same
line at Madeira.
The folloAAdng day we again took a series of temperature
observations, and the gathering upwards of
the Avarmer lines was still more marked (Station 96) ;
and on the 13th a series of observations at intervals
of 100 fathoms to a depth of 1,500 gave a like
result. The fall of temperature for the first hundred
fathoms Avas mnch the same as on the 10th.
Surface
25 fathoms
50 .
25°- 5C.
20 ■ 6
15 ■ 2
75 fathoms
100 „ .
12°- 7C.
11 • 7
On the 14th avc sounded and dredged in 1,750
fathoms, having draAvn in slightly towards the coast
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