CHAP. III. j TENERIFFE TO SOMBRERO. 1938 
On Tuesday, the 11th, we pursued our course during the 
forenoon at the rate of from six to seven knots, with a light 
breeze, force 3 to 4. At 2 p.m. shortened and furled sails, and 
got up steam to sound, and at 3 o’clock sounded in 3000 fath- 
oms. The bottom was a pale, chocolate-colored mud, with some 
gritty particles, but very little carbonate of lime, and no foram- 
inifera. The bottom temperature, registered from the mean 
of two thermometers, was 1°-3 C. On the following morning, 
March 12th, the small dredge, with the bag lined throughout 
with bread-bag, was lowered early in the morning, with a slip 
water-bottle and two thermometers. This sounding was al- 
most exactly on the spot of Lieutenant Lee’s sounding of 3300 
fathoms mentioned above, and gave a somewhat less depth, the 
“ Hydra” tube returning filled with red clay-mud from a depth 
of 2975 fathoms. The bottom had very much the character of 
that of the very deep depression which we encountered earlier 
in the cruise, only the mud was not quite so homogeneous, con- 
taining a number of gritty particles. It was, however, on the 
whole very smooth, and contained scarcely a trace of carbonate 
of lime. The thermometer registered a bottom temperature of 
1°-6 C., and the sample of bottom water had a specific gravity 
of 1-:02416 at 22°°6 C., that of the surface having a specific 
gravity of 1:02470 at 24°-°9 C. A series of temperature ob- 
servations were taken at intervals of 100 fathoms from the sur- 
face to 1500 fathoms. 
SUUAENEDGs conse cooccuaad LEENIOL FOO athOomsects cee ee ce ODT UE 
LOOsfathomsiereeen ene. 20 :0 1000 el Me A Pod 3 °3 
200 ee Sate eee ee) CLOG 1100 be 5 es oY) 
SOON roe Tanase oer h a 18: 1E 1200iey) Ss =, Dati 
400 ee icsctescn ard) 13800 cf es Se: 
DOOR Pe eatemecciets.s: oe 5 3 14000 ear 
600 YY ope cures oe OO 1500 be She ehsiereye s aeenen OED 
700 SOD sare aeveciaccis. so 4e56 2975 Se chotiom. 1 er eG 
800 CM ercetecoeha aesvee | oO 
The dredge-line was veered to over 4000 fathoms —nearly 
