444 
THE VOYAGE OF H.M.S. CHALLENGER. 
52. Globigerina Ooze. — Station 332. 
Lat. 37° 29' S., long. 27° 31' W., 2200 fathoms (Brazier). 
Portion soluble in Hydrochloric 1 
Acid -84 -95 / 
Portion insoluble in Hydrochloric 
Acid- 12 23 
Loss on ignition after drying at 230° Fahr. , 
2-82 
Alumina, 
3-76 
Ferric oxide. 
1-61 
Calcium phosphate. 
1-74 
. Manganese oxide, . 
trace 
Calcium sulphate, . 
0-68 
Calcium carbonate, . 
. 66-67 
Magnesium carbonate. 
1-33 
''Silica, 
. 10-37 
(-Alumina, 
2-18 
Ferric oxide. 
0-66 
J Lime, 
0-33 
Magnesia, 
0-11 
L Silica, ..... 
iGERiNA Ooze. — Station 338. 
9-06 
100-00 
Lat. 21° 15' S., long. 14° 2' W., 1990 fathoms (Brazier). 
Portion soluble in Hydrochloric 
Acid-97-11 J 
Portion insoluble in Hydrochloric 
Acid — 1 -49 
Loss on ignition after drying at 230° Fahr., . 1-40 
Alumina, . . . . . .0-65 
Ferric oxide, . . . . . 0'60 
Calcium phosiihate, . . .0-90 
Manganese oxide, 
■ Calcium sulphate, . . . . .0-19 
Calcium carbonate, . . . . . 92'54 
JIagnesium carbonate, . . . .0-87 
, Silica, . . . . . .1-36 
Consisting of alumina and ferric oxide, with silica, 1 ‘49 
100-00 
54. Red Mud. — Station 120. 
Lat. 8° 37' S., long. 34° 28' W., C75 fathoms (Hornung). 
0-7287 
grm. of substance dried at 100° C., lost 0-0131 
grm. . 
= 2-43 per cent. 
0-8669 
„ „ „ 0-016.69 
ff 
= 1-93 
0-9462 
,, „ ,, 0-0220 
y$ • ‘ 
-2-32 
0-9806 
„ „ ,, 0-0230 
M 
= 2-34 „ 
Mean loss on ignition. 
“2-27 
I. 0-5884 grm. of substance dried at 100° C., fused with the carbonates of soda and potash, gave 0-0354 grm. 
of water, 0-1863 gnn. of silica, 0-1511 grm. of lime, 0-0266 grm. of peroxide of iron, 0-0542 grm. of 
alumina, 0-0309 grm. of pyroi)hosphato of magnesia = 0 01 22 grm. of magnesia. 
II. 0-8381 grm. of substance dried at 100° C., treated with hydrofluoric and sulphuric acids, gave 0-0435 grin, 
of the chlorides of soda ami potash, 0-058 grm. of chloroplatinate of potash = 0-01 12 grm.of potash and, 
by difference, 0 01 37 grm. of soda. 
III. 0-9204 grm. of substance dried at 100° C. gave 0 02268 grm. of chlorine. 
IV. 0-9397 grm. of substance dried at 100° C. gave 0-1610 grm. of carbonic acid. 
V. 0-9484 grm. of substance dried at 100° C. gave 0-0076 grm. of sulphate of barium = 0-026 grm. of 
sulphuric anhydride. 
