S86 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 22S. 
OkOANIHMS PROM 
ScBFACE-Nrr*. 
Station 228 (Sounding 366), Admiralty Islands to Yokohama (see Chart 31 and 
Diagram 16). 
March 29, 1875 ; lat. 19° 24' N., long. 141° 13' E. 
Temperature of air at noon, 81°‘3 ; mean for the day, 79° ‘3. 
Temperature of water : — 
Surface, . 
80-2 
400 fathoms, 
42-6 
2o fathoms, 
79-0 
500 
• 
40-1 
50 „ . . 
77-4 
600 
38-9 
f 0 yf • 
75-0 
700 
JJ 
38-0 
100 
71-5 
800 
37-4 
125 
68-3 
900 
)) 
36-9 
150 „ 
64-8 
1000 
>) 
36-4 
175 „ 
61-3 
1100 
>) 
35-9 
200 
58 0 
1200 
35-4 
225 
55-2 
1300 
5) • • 
35-3 
250 
52-4 
1400 
>> 
35-2 
275 „ 
49-8 
1500 
5) 
35-2 
300 
47-7 
Bottom, 
35-2 
Density at 60° F. : — 
Surface, . 
. 1-02582 
200 fathoms. 
. 1-02566 
25 fathoms, 
. 1-02586 
300 
J) 
. 1-02542 
50 „ . . 
100 „ . . 
. 1-02592 
. 1-02584 
400 
. 1-02530 
Deptli, 2450 fathoms ; deposit. Red Clay, containing only a trace of carbonate of 
lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 5.20 A.M. got up steam. At 6 a.m. proceeded under steam. At 8 a.m. shortened 
and furled sails. At 9 a.m. sounded in 2450 fathoms. At noon obtained serial tempera- 
tures down to 1500 fathoms. Although the ship seemed to have actually passed over 
the 8uppo.sed position of Lindsay Islands, as laid down in the charts (position marked as 
(loul)tful), no land was visible. At 1.45 p.m. completed temperature observations and 
made sail. Black and white terns and boatswain birds were observed. 
Distance at noon from No Sima lighthouse, 932 miles. Made good 61 miles. 
Amount of current 17 miles, direction N. 17° W. 
Surface Organisms. — The following arc recorded in the note-books (March 29 to 
31) : — Oscillatoriaceac, Peridmium (three species), many specimens of Pyrocystis (two 
sfiecies), Diatoms, Rhabdospheres, Coccosphercs, Greyainna, Glohigerina, Hastigenna 
abundant, Pidvinnlina, Radiolaria abundant (especially Aulosphiera), Tintinnus and 
other Infusoria, Medusae, Siphonophorae (many forms), oval red Coelenterate larvae with 
