484 
THE VOYAGE OF H.M.S. CHALLENGER. 
130. Manganese Nodules. — Station 293. 
Lat. 39° 4' S., long. 105° 5' W., 2025 fathoms (Brazier). 
Portion soluble in Hydrochloric ' 
Acid = 76 '20 
Portion insoluble in Hydrochloric 1 ^ 
Acid= 12-60 J 
Loss on ignition after drying at 230° Fahr., 
. 11-20 
Copper, ..... 
large trace 
Alumina, ..... 
1-00 
Ferric oxide, .... 
. 20-06 
Calcium pho.sphate. 
0-69 
Manganese oxide, .... 
. 37-61 
Nickel, ..... 
good trace 
Cobalt, ..... 
Calcium sulphate, .... 
0-70 
Calcium carbonate. 
4-21 
Magnesium carbonate, 
3-93 
Silica, ..... 
8-00 
Alumina, ..... 
2-21 
Ferric oxide, .... 
0-80 
Lime, ..... 
0-78 
Magnesia, ..... 
0-11 
Silica, ..... 
8-70 
100-00 
Note.— S mall irregular shaped nodules — average weight 65 grains — blackish appearance outside, grey inside, very 
aud friable. 
131. Manganese Nodules. — Station 297. 
Lat. 37° 29' S., long. 83° 7' W., 1775 fathoms (Brazier). 
Portion soluble in Hydrochloric 
Acid- 81 -67 
} 
Portion insoluble in Hydrochloric 
Acid — 7‘13 
Loss on ignition after drying at 230° Fahr., . 11-30 
Copper, ..... small trace 
Alumina, . . . ■ .0-50 
Ferric oxide, . . . ■ .28-48 
Calcium phosphate, . . good trace 
Manganese oxide, . . . • .30-77 
■ Nickel, ..... small trace 
Cobalt, .... small trace 
Calcium sul]>hate, . . . . .0-87 
Calcium carbonate, . . . . .6-36 
Magnesium carbonate, . . . 4'39 
'Silica, ....•• 10'20 
'Alumina, ...... 0'60 
Ferric oxide, . . . .1-30 
. Lime, . . . 0'61 
Magnesia, ...... 0'18 
.Silica, 
Note. — Small irregular shaped nodules, grey colour outside, black inside. 
100-00 
