1*244 
THE VOYAGE OF H.M.S. CHALLENGER 
Station 345. 
Station 345 (Sounding 495), Ascension Island to St. Vincent (see Chart 12 and 
niagram 7). 
April 4, 1 87G ; lat. 5“ 
45' S., long. 14° 25' W. 
Temj>crature of air at noon, 81 '8 ; mean for the day, 
Temj)erature of water : — 
81°-6. 
Surface, . 
82-8 
190 fathoms, 
47°-3 
10 fathom.s, 
82-8 
200 „ 
46-9 
-’0 
82-0 
225 
45-9 
30 
796 
250 „ 
45-0 
to 
76-3 
275 . „ 
44-3 
.50 
71-6 
300 „ 
43-8 
60 „ 
650 
400 „ 
42-0 
70 „ 
59-8 
500 
40-6 
SO 
, . 56'5 
600 „ 
39-7 
90 „ 
54-4 
700 „ 
39-1 
100 „ 
52-8 
800 „ 
38-8 
110 „ 
51-8 
900 „ 
38-6 
120 „ 
51-0 
1000 
38-4 
1.30 „ 
50-2 
1100 „ 
38-2 
140 „ 
49-7 
1200 „ 
38-0 
150 „ 
49-2 
1300 
37-8 
160 „ 
48-8 
1400 , 
37-7 
170 „ 
48-3 
1500 
37-6 
180 „ 
47-8 
Bottom, 
36-8 
Density at 60“ F. ; — 
•Surface, 
. 1 02627 
300 fathoms. 
. 1-02564 
25 fathoms, 
. 1-02659 
400 „ 
. 1-02567 
50 „ 
. 1-02675 
1525 „ 
. 1-02577 
100 „ 
200 „ 
. 1-02596 
. 1-02575 
Bottom, 
. 1-02599 
Depth, 2010 fathoms; deposit, Globigerina Ooze, containing 93‘90 per cent, of 
carbonate of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 2 r..M. shortened and furled sails, and proceeded under steam to sound. At 3 p.m. 
soumled in 2010 fathoms; the sounding-tube brought up about hcalf a quart of ooze 
uniform in colour throughout. Took serial temperatures down to 1500 fathoms. 
The f-arbonic acid was determined in water from 25 fathoms, and amounted to 
34 '3 milligrammes per litre. At 5.25 p.m. completed observations, and at 5.45 p.m. 
made sail. 
(.!a})C Verde distant at noon, 1200 miles. Made good 115 miles. Amount of current 
1 1 miles, direction S. 38 \V. 
