REPOET ON THE DEEP-SEA DEPOSITS. 
437 
32. Diatom Ooze (after removal of carbonate of lime by dilute acid). — Station 157. 
Lat. 53° 55' S., long. 108° 35' E., 1950 fathoms (Renard). 
I. 0'5618 grm. of substance, dried at 120° C., gave 0'0330 grm. of loss on ignition, then treated with hydro- 
fluoric and sulphuric acids gave 0'5092 grm. of silica, 0’00112 grm. of barium, 0‘0056 grm. of the 
chlorides of potash and soda, 0'0044 grm. of chloroplatinate of potash, corresponding to 0 ‘001 34 grm. 
of chloride of potash = 0 '00085 grm. of potash, and 0'00426 grm. of chloride of soda = 0'00225 grm. 
of soda. 
II. 0'6487 grm. of substance, dried at 120° C., gave 0'0379 grm. of loss on ignition, then treated with hydro- 
fluoric and sulphuric acids gave 0'5870 grm. of sdica, 0'0013 grm. of barium, 0'0057 grm. of peroxide 
of iron, 0'0089 gim. of alumina, 0'0022 grm. of lime, and 0'0055 grm. of pyrophosphate of mag- 
nesia = 0'00198 grm. of magnesia, and traces of phosphoric acid. 
I. 
II. 
Mean. 
Silica, 
90-63 
90-49 
90-56 
Peroxide of iron, 
0-88 
0-88 
Alumina, 
1-31 
1-31 
Lime, 
0-33 
0-33 
Barium, 
0"20 
0-20 
0-20 
Magnesia, 
0-30 
0-30 
’ Potash, 
0-15 
0-15 
j Soda, 
0-40 
0-40 
! Phosphoric acid, 
trace 
trace 
trace 
i Loss on ignition. 
5-87 
5-84 
5-85 
1 
1 
99-98 
32a. Diatoms from Surface-net. — Station 157. 
1 
Lat. 53° 
55' S., long. 108° 35' E. (Anderson). 
1 Water, 
4-87 
Organic matter. 
16-75 
Alumina, 
1-38 
' Silica soluble in acid. 
1-00 
Silica insoluble in acid, 
1 
1 
76-00 
100-00 
33. 
Globigerina Ooze. — Station 1. 
Lat. 27° 24' N., 
long. 16° 55' W., 1890 fathoms (Brazier). 
Loss on ignition after drying at 230° Fahr., 
7-91 
(-Alumina, 
5-26 
Ferric oxide. 
3-95 
Portion soluble in Hydrochloric 
Acid = 73 -07 
Calcium phosphate, . . 
Calcium sulphate, . 
Calcium carbonate, . 
large trace 
0-44 
50-00 
Magnesium carbonate, 
- Silica, 
'Alumina, i 
1-32 
12-10 
3-47 
Portion insoluble in Hydrochloric 
1 J 
Lime, 
Magnesia, 
1-26 
Acid = 19 '02 
J ^ 
0-52 
.Silica, 
13-77 
100-00 
