REPORT ON THE DEEP-SEA DEPOSITS. 
488 
128. Manganese Nodules (external portions). — Station 286. 
Lat. 33° 29' S., long. 133° 22' W., 2335 fathoms (Brazier). 
Portion 
soluble in Hydrochloric 
Acid = 74 '97 
Portion insoluble in Hydrochloric 
Acid=13'68 
Loss on ignition after drying at 230° Fahr., 
. 11-35 
1 ' Copper, 
good trace 
Alumina, 
1-63 
Ferric oxide. 
16-48 
Calcium phosphate. 
good trace 
Manganese oxide. 
. 38-15 
Nickel, 
good trace 
Cobalt, 
trace 
Calcium sulphate. 
0-94 
Calcium carbonate, 
5-01 
Magnesium carbonate. 
3-26 
''Silica, 
9-50 
f Alumina, 
1-18 
Ferric oxide. 
1-40 
Lime, 
0-37 
Magnesia, 
0-22 
. Silica, 
10-51 
100-00 
Note. — The brown shelly coatings of the various other specimens. 
129. Manganese Nodules. — Station 289. 
Lat. 39° 41' S., long. 131° 23' W., 2550 fathoms (Brazier). 
Portion soluble in Hydrochloric 
Acid = 69 -70 
} 
Portion insoluble in Hydrochloric 
Acid = 16 -50 
Loss on ignition after drying at 230° Fahr. , 
f Copper, ..... 
Alumina, . . . . . 
Ferric oxide, .... 
Calcium phosphate. 
Manganese oxide, .... 
- Nickel, "I 
Cobalt, / 
Calcium sulphate, .... 
Calcium carbonate. 
Magnesium carbonate, 
''Silica, ..... 
f Alumina, ..... 
j Ferric oxide, .... 
Lime, . . 
I Magnesia, ..... 
I Silica, ..... 
13-80 
0-31 
2- 50 
19-79 
0-40 
32-02 
0-25 
0- 58 
3- 08 
1- 87 
8-90 
1-66 
1-20 
0-78 
0-26 
12-60 
100-00 
Note. — Irregular shaped nodules, dark in colour, somewhat similar in appearance to those of Station 160. 
