1122 
THE VOYAGE OF H.M.S. CHALLENGES. 
Station 299. 
Temperature of water : — 
Surface, •. 
25 
fathoms. 
50 
75 
>r 
100 
125 
L50 
175 
>f 
200 
225 
)) 
250 
)> 
275 
M 
300 
M 
Density at GO” F. 
Surface, 
25 fathoms. 
50 
100 
»» 
62-0 
400 fathoms, 
59-0 
500 ,, . . . 
53-1 
600 „ 
50-9 
700 „ 
49-1 
800 „ . . . 
47-8 
900 „ . . . 
46-5 
1000 „ . . . 
45-3 
1100 „ . . . 
44-4 
1200 „ . . . 
43-5 
1300 „ . . . 
42-8 
1400 „ . . . 
42-1 
1500 „ . . . 
41-7 
Bottom", 
. 1-02529 
’ 200 fathoms, 
. 1-02.539 
1 300 ,, . . . 
. 1-02530 
400 „ . . . 
. 1-02539 
j Bottom, 
40-6 
39-3 
38-5 
37-7 
37-0 
36-6 
36-3 
36-0 
35-8 
35-6 
35-4 
35-2 
35-2 
1-02547 
1-02545 
1-02543 
1-02567 
Depth, 2160 fathoms; deposit, Blue Mud, containing 15 ’40 per cent, of carbonate 
of lime (see j\Iurray and Kenard, Deep-Sea Deposits Chall. Exp.). 
Shortened and furled sails. Put trawl over and veered 2700 fathoms. At 6.30 a.m. 
.sounded in 2160 fathoms. The sounding- tube brought up a section of about four inches, 
the uppermost inch being of a red colour containing no calcareous organisms, while the 
lower portion was a blue-grey compact mud with several manganese grains and pieces of 
pumice. Obtained serial temperatures down to 1500 fathoms. The carbonic acid was 
determined in water from 50 fathoms, 300 fathoms, and bottom, and amounted 
respectively to 41'0, 42’9, and 44'4 milligrammes per litre. At 1 p.m. commenced 
heaving in trawl, which came up at 3.15 p.m. with numerous specimens, over a quart of 
manganese nodules and fragments of pumice, a piece of granite, small hardened 
concretions of the bottom, fragment of Cephalopod beak, and some mud ; one of the 
tow-nets at the trawl was half full of mud. At 3.30 p.m. made sail. Later in the 
••vening observed several phosphorescent patches. Diomedea exulans, black albatrosses, 
stinkers, prions, petrels, and Thala.s.sidromas were seen. 
(.a[»e Fres Montes di.stant at noon, 807 miles. Made good 17 miles. Amount of 
f-urrent 15 miles, direction N. 57“ E. 
The following species are recorded in the Zoological Reports from the trawl at this 
Station : — 
