814 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 215 . 
Station 215 (Soimding 352), Samboaugaii to New Guinea (see Chart 31 and 
Diagrams 14 and 15). 
February 12, 1875 ; lat. 4° 19' N., long. 130° 15' E. 
Temperature of air at noon, 80°‘3 ; mean for the da}% 79 '1. 
Temperature of water : — 
Surface, . 
10 fathoms. 
20 
>1 
30 
40 
n 
50 
n 
60 
M 
70 
n 
80 
90 
100 
200 
81-8 
77-7 
76-1 
75-4 
75-1 
74-5 
73-4 
72-0 
70-6 
69-3 
68-0 
54-0 
400 fathoms, 
.500 
600 „ 
700 „ 
800 „ 
900 „ 
1100 „ 
1300 „ 
1400 
1500 „ 
1600 „ 
Bottom, 
Density at 
G0° F. 
Surface, . 
50 fathoms, 
100 
150 
n 
n 
. 1-02597 
. 1-02593 
. 1-0-2627 
. 1-02584 
200 fathoms. 
400 
)> 
Bottom, 
43-2 
41-0 
39-S 
38-5 
37-5 
37-0 
36-0 
35-4 
35-4 
35-4 
35-4 
35-4 
1-02579 
1-02560 
1-02572 
Depth, 2550 fathoms ; deposit. Red Clay, containing no carbonate of lime, but large 
numbers of Radiolaria (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 7.30 A.M. got up steam. At 9 a.m. shortened and furled sails and proceeded 
under steam. At 9.30 a.m. .sounded in 2550 fathoms. At 11.30 a.m. put over trawl. 
Obtained serial temperatures down to 1600 fathoms. The carbonic acid was determined 
in the bottom water, and amounted to 52’4 milligrammes per litre. At 4 p.m. commenced 
heaving in trawl, which came up at 7.15 p.m. containing one small shrimp and a few 
pumice-stones ; in the cavities of the pumice Mr. Murray recognised some arenaceous 
Foraminifera. The small oval arenaceous Ijodies, believed to be the excreta of 
Echinoderms, which were almost constantly present in the Blue Muds from the partially- 
enclosed seas stretching between Asia and Au.stralia, in fact in all the deposits since 
leaving Cape York, were not observed in the deposit from this Station. No cloth was 
placed in the bottom of the cod of the trawl-net on this occasion, and Mr. Murray 
attributed the unsuccessful haul largely to this fact. At 7.30 p.m. made all plain sail. 
Boatswain birds and boobies were seen. 
