SUMMARY OF RESULTS. 
143 
Station 4 (Sounding 48), Tenerife to Sombrero (see Chart 6 and Diagram l). 
February 19, 1873 ; lat. 25° 28' N., long. 20 c ' 22' W. 
Temperature of air at noon, 67° ‘8 ; mean for the day, 6G°'L. 
Temperature of water : — 
Surface, . 
100 fathoms, 
200 
300 
400 
500 
600 
700 
J5 
660 
800 fathoms, 
63-0 
900 „ . 
56-8 
1000 „ . 
52-0 
1100 „ . . . 
49 '0 
1200 „ . 
46-3 
1300 „ . 
44-3 
1400 „ . 
43-0 
1500 , r . 
42:0 
4U2 
40-5 
39-9 
39-3 
38-7 
384 
37-5. 
Density at 60° F. at surface, 1 ‘02720. 
Depth, 2220 fathoms. 
At 9 a.m. sounded in 2220 fathoms, but the weights were not disengaged at the 
bottom, and the line broke in hauling in, the attached water-bottle, pressure-gauge, 
thermometers, and 2000 fathoms of line being lost. Took serial temperatures at intervals 
of 100 fathoms down to 1500 fathoms. 
Sombrero Island distant at noon, 2428 miles. Made good 19 miles. Amount of 
current 4 miles, direction S. 24° W. 
Surface Organisms. — The following are recorded in the note-books : — Collosph.eera 
and other Radiol aria ; Velella, Physalia ; several large specimens of Alciopa ; 
Copepods, Phronima sedentaria, Idothea, many larvae of Squilla ; Cardiopoda, and 
small Octopus (?). 
Willemoes-Suhm writes : “ The tow-nets captured much more in the last two nights 
than during the day ; at noon, and in the earlier hours of the afternoon especially, the 
animals seem to retire from the heated surface as much as possible.” 
Moseley writes: “Went out in a boat at mid-day; a few Radiolarians were 
noticed. A pilot fish ( Naucrates ductor) played all day under our bows, keeping quite 
close to the cut-water, within a foot or two, swimming every now r and then a little ahead 
and then dropping back again. The fish is a Scomberoid, and its dark transverse 
markings make it a striking object in the deep blue water as one looks down from the 
bowsprit. A shark was said to have been seen about the ship.” 
Station 4. 
Organisms from 
Surface-Xets. 
