754 MANGANESE DEPO.SITS OF INDIA : DESCKIPTIVE. [PaUT IV : 
A third sample (No. 40) was taken from about 800 tons of stacked 
ore quarried from the talus-ore deposits on the northern slopes of the 
east peak. It consisted of the hard braunite-psilomelane ore with a 
number of small cavities lined with black powder. The analysis made 
at the Imperial Institute showed : — 
Sample No. 40. 
Manganese peroxide . . . . . . . . . 61 "44 
Manganese protoxide ......... 16 '30 
Ferric oxide ........... 9 '73 
Silica (combined) .......... 2 '55 
Silica (free) 1-45 
Phosphoric oxide . . . . . . . . . . 0"37 
Moisture at 100° C 0-40 
This is equivalent to : — 
Manganese . . . . . . . . . . . 51 "52 
Iron G-81 
Silica 4-00 
Phosphoni-s . . . . . . . . . . . 0'16 
Moisture ........... 0'40 
and indicates that this type of ore contains about 25% of braunite, the 
remainder being psilomelane with probably a little pyrolusite (the soft 
lining to cavities). 
The three above samples indicate the following mean composition 
for the Kurmura ores : — 
Manganese . . . . . . . . . . .51*11 
Iron ............ o '58 
Silica 4-09 
Phosphorus 0-22 
Moisture 0'34 
I am indebted to Mr. W. H. Clark for the following analyses by 
Mr. R. D. Connell of ores from the Riilapur Hamesha end of the 
deposit : — 
Ore-body. 
Tonnage. 
Manganese 
Iron 
Silica 
Phosphorus 
16-60 
1040 
5-80 
0-130 
