8S8 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 229. Temperature of water : — 
Surface, 
78-5 
400 fathoms. 
44-2 
25 fathoms. 
75-7 
500 „ 
40-3 
50 „ . . 
73-3 
600 
38-5 
75 ,, . . 
71-0 
700 „ 
37-7 
100 
69-0 
800 
37-2 
125 
66-9 
900 
36-7 
150 
64-8 
1000 
36-3 
175 „ 
62-5 
1100 
35-8 
200 „ 
60-4 
.1200 „ .* . 
35-3 
225 
58-3 
1300 
35-2 
250 
56-2 
1400 
35-2 
275 „ 
54-1 
1500 
35-2 
300 
52-0 
Bottom, 
35-2 
Density at 60° F. : — 
Surface, 
. 1-02613 
200 fathoms. 
. 1-20555 
25 fathoms, 
. 1-02590 
300 „ 
. 1-02507 
50 „ . . 
. 1-02594 
400 „ 
. 1-02528 
100 „ 
. 1-02580 
Depth, 2500 fathoms ; deposit, Eed Clay, contaiuing only a trace of carbonate of 
lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 3.15 A.M. shortened and furled sails, and got up steam. At 5.15 a.m. stopped, 
and at 6 a.m. sounded in 2500 fathoms. At 7 a.m. put over trawl. At 10 a.m. obtained 
serial temperatures down to 1500 fathoms. The carbonic acid was determined in water 
from 300 fathoms, and amounted to 34 '0 milligrammes per litre. At 2 p.m. commenced 
heaving in trawl, but at 5.30 p.m. the weights only came up, the rope having parted just 
below the weights, and the trawl and 500 fathoms of rope were lost. Lord Campbell 
shot on the wing an albatross {Diomeclea hrachyura), and other albatrosses, petrels, 
prions, boatswain birds, and phaleropes were seen. 
Distance at noon from No Sima lighthouse, 772 miles. Made good 44 miles. 
Amount of current 4 miles, direction N. 45° W. 
Diatomace.-e. — The following species of Diatoms were observed by Mr. Rattray and 
^Ir. Comlier in the deposit from this Station : — 
Savievla viuUicoMata, Grunow. 
major, Kutzing (fresh water). 
radio$a, Kutzing (fresh water). 
NiizKhia marina, Grunow. 
„ ^calartH, W. Smith. 
Triceratium Ketjchidlaue, Grunow. 
Ucmidiseua r.uneifoi'mis, Wallich. 
Ceraianlvs turgidm, Ehrenberg. 
Coscinodisctu leptojms, Janisch. 
„ angmte-UncatiLs, A. Schmidt. 
„ excmtricua, Ehrenberg. 
,, denarius, A. Schmidt. 
