REPORT ON THE DEEP-SEA DEPOSITS. 
467 
102. Manganese Nodules. — Station 248. 
Lat. 37° 41' N., long. 177° 4' W., 2900 fathoms (Brazier). 
Portion soluble in Hydrochloric 
Acid = 61 '10 
Portion insoluble in Hydrochloric 
Acid = 22 '40 
} 
Loss on ignition after di-ying at 230° Fahr., 
. 16-50 
^Copper, 
large trace 
Alumina, ..... 
2-50 
Ferric oxide, .... 
. 20-50 
Calcium phosphate. 
good trace 
Manganese oxide, .... 
. 22-50 
Nickel, ..... 
good trace 
Cobalt, ..... 
Calcium sulphate, .... 
0-85 
Calcium carbonate. 
2-65 
Magnesium carbonate, 
1-10 
Silica, ..... 
11-00 
^ Alumina, ..... 
2-17 
Ferric oxide, .... 
1-16 
Lime, ..... 
0-65 
Magnesia, ..... 
0-32 
1 Silica, ..... 
. 18-10 
100-00 
Note. — F or the purpose of analysis a small nodule and an equal quantity of a large one were mixed as a whole. 
103. Manganese Nodules. — Station 252. Lat. 37° 52° N., long. 160° 17' W., 2740 fathoms (Brazier). 
Portion soluble in Hydrochloric 1 
Acid = 68-48 / 
Portion insoluble in Hydrochloric 1 _ 
Acid = 20 -92 / " 
Loss on ignition after drying at 230° Fahr., 
Copper, 
Alumina, 
Ferric oxide. 
Calcium phosphate 
Manganese oxide. 
Nickel, 
Cobalt, 
Calcium sulphate. 
Calcium carbonate. 
Magnesium carbonate. 
Silica, 
r Alumina, 
Ferric oxide. 
Lime, 
Magnesia, . 
Silica, 
Note. — Three smooth round nodules 
. 10-60 
small trace 
3-50 
19-33 
trace 
. 28-50 
good trace 
0-88 
3-37 
1- 90 
11-00 
2- 35 
1-15 
0-45 
0-23 
16-74 
100-00 
104. Manganese Nodule (internal portion). — Station 252. Lat. 37° 52' N., long. 160° 17' W., 
2740 fathoms (Brazier). 
Portion soluble in Hydrochloric 
Acid = 64 '53 
Portion insoluble in Hydrochloric 
Acid = 14-67 
} 
Loss on ignition after drying at 230° Fahr., 
. 20-80 
' Copper, 
trace 
Alumina, 
5-00 
Ferric oxide. 
. 17-83 
Calcium phosphate. 
mere trace 
Manganese oxide. 
. 25-37 
Calcium sulphate, . 
0-58 
Calcium carbonate. 
3-58 
Magnesium carbonate. 
2-27 
. Silica, 
9-90 
Alumina, 
1-70 
Ferric oxide. 
0-90 
Lime, 
0-50 
Magnesia, . 
0-20 
^ Silica, 
. 11-37 
100-00 
