1034 
THE VOYAGE OF H.M.S. CHALLENGER. 
Stahok 271. Station 271 (Sounding 413), Sandwich Islands to Tahiti (see Chart 38 and 
Diagram 19). 
September 6, 1875 ; lat. 0° 
33' S., Ion 
g. 151° 34' W. 
Temperature of air at noon. 
78“'3 ; mean for the day, 77°‘3. 
Temperature of water ; — 
Surface, 
0 
78-7 
180 fathoms, . 
52-2 
10 fathoms. 
77-0 
190 
51-6 
20 „ . . . 
76-2 
200 „ 
51-0 
30 „ . . . 
76-2 
300 „ 
46-5 
40 
76-2 
400 
42-9 
50 „ . . . 
76-2 
500 „ 
40-7 
60 „ . . . 
76-2 
600” „ 
39-5 
70 „ . . . 
74-5 
700 
38-7 
80 
68-8 
800 „ 
38-2 
90 
63-2 
900 „ 
37-7 
100 
59-4 
1000 „ 
37-2 
110 „ . . . 
57-0 
1100 
36-7 
120 „ . . . 
56-0 
1200 
36-3 
130 
55-3 
1300 „ 
36-1 
140 „ . . . 
54-7 
1400 
35-9 
150 „ . . . 
54-1 
1500 
35-7 
160 „ . . . 
53-4 
Bottom, 
35-0 
170 „ . . . 
52-8 
Density at 60“ F. : — 
Surface, .... 
1-02661 
400 fathom.s, 
. 1-02577 
25 fathoms, 
1-02625 
800 „ 
. 1-02591 
50 „ . . . 
1-02638 
1975 „ 
. 1-02594 
100 „ . . . 
1-02622 
Bottom, 
. 1-02587 
200 
1-02588 
Depth, 2425 fathoms ; deposit, Globigerina Ooze, containing 81*27 per 
carbonate of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 4.30 A.M. shortened and furled sails, and got up steam to sound. At 5.30 a.m. 
sounded in 2425 fathoms. It is to be noted that in this and the previous sounding 
there was a greater abundance of carbonate of lime organisms than might be expected at 
such great depths, and this seems to be connected with the large number of pelagic 
Korarainifera and Pteropods found on the surface in this locality in the equatorial and 
counter equatorial streams. At 7.30 a.m. put over trawl. Obtained serial temperatures 
down to 1500 fathoms. At 1 p.m. commenced heaving in trawl, which came up at 4 p.m. 
with numerous specimens. At 4.30 p.m. made all plain sail. 
Venus Point, Tahiti, distant at noon, 1020 miles. Made good 94 miles. Amount of 
current 41 miles, direction S. 81“ AV. 
