REPORT ON THE DEEP-SEA DEPOSITS. 
487 
135. Manganese Nodule. — Station 302. 
Lat. 42° 43' S., long. 82° 11' W., 1450 fathoms (Brazier). 
Portion soluble in Hydrochloric ) 
Acid = 82 -80 / 
Portion insoluble in Hydrochloric 
Acid = 5 "80 
} = 
Loss on ignition after drying at 230° Fahr., 
11-40 
Copper, ..... 
small trace 
Alumina, ..... 
0-55 
Ferric oxide, .... 
. 39-75 
Calcium phosphate, 
good trace 
Manganese oxide, .... 
. 22-27 
Nickel, ..... 
mere trace 
Cobalt, ..... 
Calcium sulphate, .... 
1-27 
Calcium carbonate. 
4-08 
Magnesium carbonate. 
3-48 
t Silica, ..... 
11-40 
■■Alumina, ..... 
0-60 
Ferric oxide, .... 
1-10 
Lime, ..... 
0-39 
Magnesia, ..... 
0-11 
. Silica, ..... 
3-60 
100-00 
Note. — Small mass, no definite shape, but appeared as if broken from some larger mass, similar to the specimen 
from Station 3. 
136. Manganese Nodule. — Station 276. 
Lat. 13° 28' S., long. 149° 30' W., 2350 fathoms (Renard). 
I. 0'8271 grm. of substance dried at 100° C., gave 0‘0787 grm. of water, 0T600 grm. of sdica, 0‘0264 grm. 
of lime, 0'0526 grm. of alumina, 0’2208 grm. of peroxide of iron, 0‘0148 grm. of magnesia, 0'2354 grm. 
of manganese sesquioxide (Mn 203 ) = 0 2189 grm. of manganous oxide (MnO), 0’0119 grm. of nickel 
(Ni) = 0’0151 grm. of oxide of nickel. 
II. 0T425 grm. of substance dried at 100° C., treated with hydrochloric acid and the resulting gas conducted 
into a solution of iodide of potash liberated iodine; 12 c.c. of thiosulphate of potash (1 c.c. = 0'937 c.c. 
Cl 
O 
of the standard solution) ; 1 c.c. of the standard solution = jq or — , whence 
20 ’ 
1 c.c. = 3‘55 grms. of 
chlorine or 0‘8 grm. of oxygen — 
1000 : 0-8 = 12 X 0-9377 : as. 
.-. 1000 : 0-8 = 11-24 : as. 
.-. X =0-008992 grm. of oxygen capable of liberating chlorine from hydrochloric acid, i.e., 6-31 per cent, 
of oxygen. 
The atomic ratio of 0-384 0 is required if Mn he present as Mn02 and Ni as Ni 203 , but 0'394 0 was the 
ratio observed — 
Manganous oxide. 
26-46 
MnO 
= 71 
0-372 
Nickel, .... 
1-82 
Ni 
= 74-8 
0-024 
Oxygen, .... 
6-31 
0 
= 16 
0-394 
0-372 
0-024 
= 0-384 
