440 
THE VOYAGE OF H.M.S. CHALLENGEE. 
40. Globigerina Ooze. — Station 16. 
Lat. 20° 39' N., long. 50° 33' W., 2435 fathoms (Brazier). 
Portion 
soluble in Hydrochloric 
Acid — 78'40 
}- 
Portion insoluble in Hydrochloric 
Acid -12-00 
}- 
Loss on ignition after drying at 230° Fahr., 
9-60 
f Alumina, ..... 
4-00 
Ferric oxide, .... 
7-10 
Calcium phosphate. 
small trace 
Calcium sulphate, .... 
2-32 
Calcium carbonate, .... 
. 52-22 
Magnesium carbonate, 
■ Silica, ..... 
0-76 
. 12-00 
r Alumina, -| 
Ferric oxide, j - - ■ - 
Lime, ..... 
0-64 
Magnesia, ..... 
0-40 
1 Silica, ..... 
8-00 
100-00 
Notk. — When treated with dilute hydrochloric acid this substance evolved a perceptible tarry odour. 
41. Globigerina Ooze. — Station 17. 
Lat. 20° 7' N., long. 52° 32' W., 2385 fathoms (Brazier). 
Portion 
Loss on ignition after drying at 230° Fahr., 
' Alumina, 
Ferric oxide, 
Calcium phosphate. 
Calcium sulphate, . 
Calcium carbonate, . 
Magnesium carbonate, 
Silica, 
Portion insoluble in Hydrochloric 1 ^ / Insoluble residue, principally alumina and ferric \ 
J 1 oxide, with silica, / 
soluble 
Acid 
in Hydrochloric L = 
=.83-44 f 
Acid -9 -72 
6-84 
2-69 
9-05 
1-74 
0-81 
58-40 
0-68 
10-07 
9-72 
Note. — Material at command only 27-80 grains ; this yielded : — 
Loss on ignition, .... 
Soluble in acid, .... 
Insoluble ,, 
100-00 
1- 90 gr. 
23-20 ,, 
2- 70 „ 
27-80 „ 
42. Globigerina Ooze. — Station 64. 
Lat. 35° 35' N., long. 50° 27' W., 2700 fathoms (Brazier) 
Portion soluble in Hydrochloric 
Acid — 65-39 
Portion insoluble in Hydrochloric 
Acid -26-71 
Loss on ignition after drying at 230° Fahr., 
7-90 
Alumina, 
4-75 
Ferric oxide. 
5-95 
Calcium phosphate. 
2-80 
Maugane.se oxide, 
. trace 
Calcium sulphate, . 
0-29 
Calcium carbonate, . 
. 37-51 
Magnesium carbonate. 
1-13 
. Silica, 
. 12-96 
' Alumina, 
6-35 
Ferric oxide. 
1-08 
Lime, 
0-41 
Magnesia, . 
0-12 
.Silica, 
. 18-75 
100-00 
