REPORT ON THE DEEP-SEA DEPOSITS. 
449 
65. Blue Mud. — Station 323. 
Lat. 35° 39' S., long. 50° 47' W., 1900 fathoms (Renard). 
I. 0‘8069 grm. of substance dried at 110° C., fused with the carbonates of soda and potash, gave 0'4804 grm. 
of silica, 04566 grm. of alumina, 0'0576 grm. of peroxide of iron, 0'0135 grm. of lime, 0'0427 grm. of 
pyrophosphate of magnesia = 0'01 55 grm. of magnesia, and 0'0503 grm. of loss on ignition. 
II. 1‘4212 grms. of substance dried at 110° C., treated with hydrofluoric and sulphuric acids, gave 0'0995 grm. 
of the chlorides of soda and potash, 0‘1603 grm. of chloroplatinate of potash = 0'0202 grm. of potash 
and, by difference, 0'0382 grm. of soda. 
Silica, .... 
Alumina, 
Peroxide of iron, 
Lime, .... 
Magnesia, 
Potash, 
Soda, .... 
Water, . . . . 
Phosphoric and sulphuric acids. 
. 59-54 
. 19-42 
7-15 
1-68 
1-93 
1- 35 
2 - 68 
6-24 
traces 
66. Green Sand. — Station 141. 
Lat. 34° 41' S., long. 18° 36' E., 98 fathoms (Brazier). 
99-99 
Portion soluble in Hydrochloric 
Acid = 67 -90 
Portion insoluble in Hydrochloric 
Acid = 23-00 
} 
Loss on ignition after drying at 230° Fahr., . 9-10 
f Alumina, . . . . . .2-30 
Ferric oxide, . . . .4-70 
Calcium phosphate, .... trace 
. Calcium sulphate, . . . . .1-07 
Calcium carbonate, . . . . .49-46 
Magnesium carbonate, . . . .2-02 
.Silica, . . . . . .8-35 
t Alumina, . . . ... . 0-95 
I Ferric oxide, . . . . .0-35 
.{ Lime, . . . . • .0-22 
I Magnesia, . . . . . .0-13 
L Silica, . . . . ■ .21-35 
100-00 
67. Green Mud. — Station 164c. 
Lat. 34° 13' S., long. 151° 38' E., 410 fathoms (Brazier). 
Portion soluble in Hydrochloric 
Acid = 72 -29 
} 
Portion insoluble in Hydrochloric 
Acid = 24-41 
} 
Loss on ignition after drying at 230° Fahr., 
3-30 
' Alumina, . . . . • 
2-50 
Ferric oxide, .... 
12-30 
Calcium phosphate. 
0-70 
Manganese oxide, .... 
' Calcium sulphate, . . . ■ 
0-58 
Calcium carbonate, .... 
. 46-36 
Magnesium carbonate, 
0-57 
Silica, . . ■ 
9-28 
f Alumina, . . . • • 
1-58 
1 Ferric oxide, .... 
0-42 
^ Lime, . . . . • 
0-30 
1 Magnesia, . . . • • 
0-12 
1, Silica, . . • ■ • 
. 21-99 
100-00 
(deep-sea deposits chall. exp. — 1891.) 
59 
