G70 
Til E VOYAGE OF H.M.S. CHALLENGER. 
Station 178 . 
Organisms prom 
Suh pace- Nets. 
Station 179 . 
At 1 p.m. got up steam. At 1.15 p.m. shortened and furled sails, proceeded under 
steam, and sounded in 2650 fathoms. Took serial temperatures down to 1500 fathoms. 
At 4.30 p.m. completed observations, and at 5 p.m. made sail. 
lvaiue Island distant at noon, 1286 miles. Made good 149 miles. Amount of 
current 2 miles, direction S. 64° W. 
Surface Organisms. — Several tow-nets were lost or torn ; the following were, how- 
ever, observed : — Periclinium, many Globigerinae, Sagitta, many Crustaceans, Pteropods 
and Pteropod larvae, S'tlpx. The stomach of a Salpa contained 'many Rhabdospheres, 
a few Coccospberes, many Acanthometrae, and one or two Coscinodisci. The screw was 
takeu up and found to be covered with Sertularia, Tubularia, and barnacles. 
Station 179 (Sounding 309), Fiji to Raine Island (see Chart 27 and Diagram 13). 
August 21, 1874 ; lat. 15° 58' S., long. 160° 48' E. 
Temperature of air at noon, 78°‘8 ; mean for the day, 77°‘3. 
Temperature of water : — 
Surface, . 
790 
900 fathoms, 
37-7 
100 fathoms, 
711 
1000 „ 
36-8 
200 „ 
55-5 
1100 „ 
36-4 
300 „ . . 
45-2 
1200 
36 0 
400 „ 
41-6 
1300 
36-0 
500 „ 
40 0 
1400 „ 
36 0 
600 „ . . 
389 
1500 
36-0 
700 „ . 
38-3 
Bottom, 
36-0 
800 „ . . 
37*7 
Density at 60° F.: — 
Surface, 
1 -02634 
300 fathoms, 
. 1 02614 
100 fathoms, 
1-02667 
400 „ 
. 1-02591 
200 „ . . 
1-02619 
Bottom, 
. 
. 1-02594 
Depth, 2225 fathoms; deposit, Globigerina Ooze, containing 32‘29 per cent, of 
carbonate of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 10 a.m. got up steam. At 11.30 a.m. shortened and furled sails. At noon pro- 
0 • led under steam, and at 1 p.m. sounded in 2325 fathoms. Obtained serial temperatures 
down to 1500 fathoms, also specimens of water for analysis. The carbonic acid was 
1 termined in water from 200 fathoms, and amounted to 44‘4 milligrammes per litre. 
At 3 p.m. completed observations, and at 3.20 p.m. made all plain sail. 
