438 
THE VOYAGE OF H.M.S. CHALLENGER. 
34. Globigeuina Ooze. — Station 2. 
Lat. 25° 52' N., long. 19° 22' W., 1945 fathoms (Brazier). 
Loss on ignition after drying at 230° Fahr., 
5-02 
f Alumina, ..... 
3-23 
Fei-ric oxide, .... 
4-18 
Portion soluble in Hydrochloric ) 
Acid -82-90 i 
Calcium phosphate, 
. trace 
= . 
Calcium sulphate, .... 
Calcium carbonate. 
0-69 
. 64-55 
Magnesium carbonate. 
1-17 
Silica, ..... 
9-08 
('Alumina, ..... 
1-79 
Ferric oxide, .... 
0-60 
Portion insoluble in Hydrochloric 1 
Lime, ..... 
0-33 
Acid = 12-08 / 
Magnesia, ..... 
0-28 
.Silica, ..... 
9-08 
100-00 
35. Globigerina Ooze. — Station 11. 
Lat. 22° 45' N., long. 40° 37' W., 2575 fathoms (Brazier). 
Loss on ignition after drying at 230° Fahr. , 
9-13 
Alumina, ..... 
5-61 
Fen-ic oxide, .... 
4-65 
Portion soluble in Hydrochloric | 
Acid = 76 -59 / 
Calcium phosphate. 
Calcium sulphate, .... 
1-02 
Calcium carbonate. 
. 51-16 
Magnesium carbonate. 
1-93 
Silica, ..... 
. 12-22 
Portion insoluble in Hydrochloric I 
1 
Insoluble residue, principally alumina and j 
. 14-28 
Acid = 14 -28 / 
ferric oxide, with silica, 1 
100-00 
Note. —Material at command only 9-80 grains 
this yielded : — 
Loss on ignition, 
0-895 gr. 
Soluble in acid, 
7-506 „ 
Insoluble ,, . 
1-399 „ 
9-800 „ 
When treated with dilute hydrochloric acid it evolved a perceptible tarry odour. 
S'S. Globigerina Ooze. — Station 12. 
Lat. 21° 57' N., 43° 29' W., 2025 fathoms (Brazier). 
Loss on ignition after drying at 230° Fahr. , 
8-80 
'Alumina, ..... 
19-24 
Ferric oxide, .... 
13-74 
Portion soluble in Hydrochloric \ _ 
Calcium phosphate. 
fair trace 
Acid -80 -22 / 
Calcium sulphate, .... 
1-37 
Calcium carbonate. 
43-93 
.Magnesium carbonate. 
1-94 
Portion insoluble in Hydrochloric 1 _ I 
’ General residue, consisting of soluble silica » 
10-98 
Acid- 10-98 / 1 
with the insoluble silicates, j 
100-00 
oTE. — .Material at commaiirl only 9 10 grains ; this yielded 
Jjry»n on ignition. 
o 
00 
o 
g»- 
Soluble in acid. 
7-30 
Insoluble ,, . 
1-00 
1 1 
9-10 
fi 
hfti treated with dilute hydrochloric acid it evolved a perceiitiblc tarry odour. 
