478 
THE VOYAGE OF H.M.S. CHALLENGER. 
118. Manganese Nodules. — Station 281. 
Lat. 22° 21' S., long. 150° 17' W., 2385 fathoms (Brazier). 
Portion soluble in H^'drochloric \ ^ 
Acid = 75 -77 / 
Portion insoluble in Hydrochloric \ _ 
Acid = 13 ‘25 J 
Loss on ignition after drying at 230° 
Fahr., . 10-98 
Copper, .... 
good trace 
Alumina, . . 
3-38 
Ferric oxide. 
. 32-50 
Calcium phosphate, 
Manganese oxide, 
. 19-92 
Calcium sulphate, . 
0-63 
Calcium carbonate. 
2-81 
Magnesia, .... 
1-41 
Silica, .... 
. 15-12 
Alumina, . . . . 
1-30 
Ferric oxide. 
1-52 
Lime, . . . . 
0-84 
Magnesia, 
0-35 
Silica, . . . . 
9-24 
100-00 
icient to test for nickel and cobalt. 
Kesidue after acid, grey 
119. Manganese Nodules. — Station 281. 
Lat. 22° 21' S., long. 15° 17' W., 2385 fathoms (Brazier). 
Loss on ignition after drying at 230° Fahr., 
5-66 
Copper, 
trace 
Alumina, 
2-70 
Ferric oxide. 
27-80 
Calcium phosphate. 
good trace 
Manganese oxide, . 
6-61 
Portion soluble in Hydrochloric 1 _ 
Nickel, 
trace 
Acid -71 -62 
Cobalt, 
trace 
Calcium sulphate, . 
0-29 
Calcium carbonate, . 
2-79 
Magnesium carbonate. 
1-13 
- Silica, 
. 30-40 
' Alumina, 
2-13 
Ferric oxide. 
6-04 
Portion insoluble in Hydrochloric 1 _ 
Lime, 
2-69 
Acid-22-72 / 
Magnesia, . 
0-36 
L Silica, . 
. 12-60 
i 
Note. — Sec Analysis 117. 
100 00 
