778 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [pART IV : 
namely 4-75-4-82. The difference may be another indication of the 
presence of a very small amoiint of psilomelane, or it may point to the pre- 
sence of cavities between the individual grains of bramiite, some of which 
did not become filled with water when the determination was made. 
A sample was taken from the outcrops on hills 1 and 2 by breaking 
off pieces of ore at regular intervals all along the ridge and from each 
side. The sample thus obtained was analysed at the Imperial Institute 
wdth the following result : — 
Sample No. 9. 
45-84 
33 19 
Manganese peroxide 
Manganese protoxide 
Ferric oxide . 
Baryta . 
('oiiiliiiie'J silica 
Fret' silica 
Phosphoric oxide 
Moisture at lOO'C. 
7-1.5 
0- 9S 
5-12 
1- 87 
0-16 
0-17 
This indicates a mixture, assuming all the braunite present to have 
the formula TMngOg. 2MnSi03, of .58% of braunite with 42% of psilome- 
lane or other nianganates. The analysis is equivalent to : — 
Manganese . . . . . . . . .54-73 
Iron 5-00 
Phosphorus 0*070 
Sihca (total) 6-99 
showing that the ore is of very high quality. 
The following analyses, published with the kind permission of the 
Directors of the Indian Manganese Company, are taken from reports 
made by Mr. H. Kilburn Scott and Mr. W. Selkirk for this Company. 
Analyses from Mr. Scott's report. 
Number. 
1 
2 
3 
4 
5 
Manganese .... 
55 
51 
55-85 
56-82 
53-05 
51-87 
Iron ..... 
4 
39 
5-03 
4-92 
2-82 
4-92 
All 
■ dried 
Silica 
8 
40 
0-83 
8-76 
1-10 
16-27 
at 
212''F. 
Phosphorus .... 
0 
035 
0-135 
0-115 
0-004 
0-033 
No. 1. Fro7n outcrop along the summit of hillocks Nos. 1 and 2. 
No. 2. From hillock No. 3 taken at different parts of the outcrop. 
Nos. 3. to 5 arc characteristic types from outcrop of which : — 
No. 3. Finely crystalline and almost amorphous. 
No. 4. Highly crystalline, supposed to be braunite. 
No. 5. Highlv crystalline, supposed to be braunite, included some glassy quartz. 
