1030 
THE VOYAGE OF H.M.S. CHALLENGER. 
Statiom 270. 
Temperature of water : — 
Surface, . 
79-5 
180 fathoms, 
52-6 
10 fathoms, 
78-7 
190 
9 } 
52-3 
20 „ . . 
77-7 
200 
>} 
52-0 
30 „ 
77-0 
300 
99 
48-3 
40 „ 
76-2 
400 
99 
45-0 
50 „ . . 
75-5 
500 
)J • 
42-7 
60 . . 
75-3 
600 
99 
40-6 
70 „ 
75-3 
700 
99 
39-5 
80 „ 
72-8 
800 
99 
38-7 
90 „ . . 
67-3 
900 
38-0 
100 „ 
62-8 
1000 
99 
37-7 
110 „ 
59-1 
1100 
99 
37-3 
120 „ 
56-5 
1200" 
99 
37-0 
130 „ 
550 
1300 
99 
36-7 
140 „ 
54-2 
1400 
99 
36-3 
150 „ 
53-5 
1500 
99 
360 
160 „ 
170 „ 
53-2 
52-9 
Bottom, 
34-6 
Density at 60° F. : — 
Surface, . 
. 1-02621 
300 fathoms, 
. 1-02575 
25 fathoms. 
. 1-02591 
400 
99 • 
, 
. 1-02572 
50 „ . . 
. 1-02572 
2500 
99 • 
. 1-02575 
100 „ 
200 „ . . 
. 1-02567 
. 1-02572 
Bottom, 
• 
. 1-02578 
Depth, 2925 fathoms; deposit, Globigerina Ooze, containing 71 ’47 per cent, of 
carbonate of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 4.15 A.M shortened and furled sails. At 5.30 a.m proceeded under steam. At 
6 A.M. sounded in 2925 fathoms. There were about six inches of ooze in the tube, the 
lower part pure white and gradually becoming brown on the upper surface. The white 
lower layer was nearly pure Globigerina Ooze, while the upper brown layer seemed to be 
composed of equal parts of siliceous and calcareous organisms. Took serial temperatures 
down to 1500 fathoms. At 8.30 a.m. temperature line fouled the screw. Stopped and 
lowerctl whaler to inspect the line ; raised screw and cleared the line. At noon 
completed obser\'ation8 and made all plain sail. 
\ enu.s Point, Tahiti, distant at noon, 1203 miles. Made good 104 miles. Amount 
of current 55 miles, direction S. 76° W. 
The following species of Deep-Sea Keratosa and Radiolaria were observed in the deposit 
from this Station (see also Murray and Renard, Deep-Sea Deposits Chall. Exp.) : — 
