300 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 90. 
Density at 60' F. : — 
Surface, 
. 1-02688 
400 fathoms, 
. 1 02610 
100 fathoms, 
. 1 02735 
500 „ 
. 1 02605 
150 „ . . 
. 1 02661 
Bottom, 
. 1 02645 
300 „ . . 
. 1-02645 
Depth, 2400 fathoms ; deposit, Globigerina Ooze. 
At 11.20 a.m. shortened and furled sails, and got up steam to sound. At 1 p.m. 
sounded in 2400 fathoms. At 2.30 p.m. took serial temperatures at intervals of 
100 fathoms down to 1400 fathoms, and obtained sample of bottom water for analysis. 
At 4 p.m. completed temperatures, and at 4.10 p.m. made all plain sail. The water 
>till retained its green colour. 
Distance at noon from St. Vincent, Cape Verdes, 2G8 miles. Made good 95 miles. 
Amount of curreut 4 miles, direction S. 63° W. 
Station 91. 
Station 91 (Sounding 
155), Madeira to Cape Verde 
Islands (see Chart. 
Diagram 7). 
July 25, 1873 ; lat. 19° 
4' N., long. 24° 6' W. 
Temperature of air at noon, 75°'8 ; mean for the day, 74 
Temperature of water : — 
°*1. 
Surface, . 
740 
600 fathoms, 
41*9 
100 fathoms, 
600 
700 „ 
40-7 
200 „ . . 
54-0 
800 
39-8 
300 „ 
49-5 
900 
39 1 
400 „ 
46-2 
1000 „ 
38-6 
500 „ . . 
43-5 
Bottom, 
36-5 
Density at 60 F. : — 
Surface, . 
. 1 02710 
300 fathoms, 
. 1-02623 
100 fathoms, . 
. 1-02637 
400 „ 
. 1-02606 
200 „ . . 
. 1-02649 
Bottom, 
. 1-02696 
Depth, 2075 fathoms; deposit, Globigerina Ooze, containing 60'95 per cent, of 
carbonate of lime (see Murray and Rcnard, Deep-Sea Deposits Chall. Exp.). 
At 1.15 p.m. shortened and furled sails, and got up steam to sound. At 2 p.m. 
-ound' d in 2075 fathoms, and obtained serial temperatures at intervals of 100 fathoms 
down to 1000 fathoms. Sent down water-bottle and procured samples of water from 
100, 200, 300, and 400 fathoms, and bottom. The water, which for the last two days 
