REPORT ON THE DEEP-SEA DEPOSITS. 
485 
131a. Maistgajstese Nodules (internal portions). — Station 297. 
Lat. 37° 29' S., long. 83° 7' W., 1775 fathoms (Anderson). 
Portion soluble in Hydrochloric 1 ^ 
Acid = 40 -68 J 
Portion insoluble in Hydrochloric 
Acid=50‘48 
}- 
Loss on ignition after drying at 100° C,, . 
8-66 
' Alumina, ..... 
14-04 
Ferric oxide, .... 
10-23 
Manganese dioxide. 
4-16 
Magnesia, ..... 
0-75 
Potash, ..... 
3-61 
Soda, ..... 
3-22 
Phosphoric acid, .... 
large trace 
..Silica, ..... 
4-67 
( Alumina, ..... 
4-63 
Ferric oxide, .... 
0-63 
Magnesia, ..... 
0-46 
Potash, ..... 
0-46 
Soda, ..... 
0-23 
''Silica, ..... 
44-07 
99-82 
Note. — The nuclei used in this analysis were white or brownish white in colour, very light in weight, and easily cut with 
a knife. They contained 13'4 per cent, of moisture, and on ignition fused into a blackish glass. 
132. Manganese Nodules. — Station 299. 
Lat. 33° 31' S., long. 74° 43' W., 2160 fathoms (Brazier). 
Portion soluble in Hydrochloric 
Acid=77-50 
} 
Portion insoluble in Hydrochloric 
Acid = 10 '70 
Loss on ignition after drying at 230° Fahr., 
. 11-80 
' Copper, 
trace 
Alumina, 
0-70 
Ferric oxide. 
6-08 
Calcium phosphate. 
trace 
Manganese oxide, . 
. 55-67 
Nickel, 
small trace 
Cobalt, 
Calcium sulphate, . 
0-58 
Calcium carbonate, . 
5 -.57 
Magnesium carbonate. 
1-90 
'^Silica, 
7-00 
'Alumina, 
2-30 
Ferric oxide. 
0-70 
Lime, 
0-49 
Magnesia, . 
0-11 
^Silica, 
7-10 
Note. — Two smaller nodules taken as a whole. 
100-00 
