1S6 
THE VOYAGE OF H.M.S. CHALLENGED. 
Station 28. 
ORr.ANISMa FROM 
Surface. 
Station 29. 
Density at 60" F. at surface, 1 ‘02710; bottom, 1 ’02608. 
Depth, 2850 fathoms; deposit, Red Clay, containing 18 ’79 per cent, of carbonate 
of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 7.30 a.m. shortened and furled sails, and got up steam to sound and dredge. At 
9 a m. sounded in 2850 fathoms. At 11 a.m. lowered dredge. At 1 p.m. took a series 
of temperatures at intervals of 100 fathoms down to 1500 fathoms. At 5.30 p.m. dredge 
came up empty, rope, weights, tangles, and dredge twisted round each other in almost 
inextricable confusion. Took a second series of temperatures at intervals of 50 fathoms 
down to 200 fathoms in order to confirm temperatures obtained earlier in the day. The 
carbonic acid was determined in the bottom water, and amounted to 52’0 milligrammes 
per litre. 
Distance from Bermuda at noon, 458 miles. Made good 110 miles. Amount of 
current 20 miles, direction N. 47° W. 
Surface Organisms. — Moseley writes : “ Murray and I went out in the jolly-boat. The 
gulf- weed was in much greater abundance than we have seen it before. There were patches 
about the ship in the morning several square yards in extent. Antennarius is to be 
found clinging even to very small isolated pieces, as are also the Crustacea, the animals 
not being by any means confined to the larger pieces. 1 obtained several Planarians.” 
Station 29 (Sounding 76), St. Thomas to Bermuda (see Chart 6 and Diagram 2). 
March 31, 1873 ; lat. 27° 49' N., long. 64° 59' W. 
Temperature of air at noon, 
7 4° ’3 ; mean for the day, 72 
’’7. 
Temperature of water : — 
Surface, .... 
° 
72-0 
350 fathoms, . 
54-5 
10 fathoms, . 
730 
400 „ 
50-9 
20 „ ... 
72-5 
450 „ 
47’4 
30 
71-4 
500 „ 
44-7 
*0 „ ... 
70-3 
600 
41-7 
50 
694 
700 
40-5 
60 
68-4 
800 „ 
39-8 
70 
67-4 
900 
39-3 
80 
66-4 
1000 
38-9 
oo 
65-5 
1100 „ ’ . 
38-6 
100 „ ... 
64-5 
1200 „ 
38-3 
150 „ . . . 
63-8 
1300 
38-0 
200 
62-8 
1400 „ 
37-7 
250 „ ... 
61 -2 
1500 „ 
37 ’4 
300 
580 
Bottom, 
36-4 
