872 MANGANESE DEPOSITS OF INDIA : DESCKIPTIVE. [PaUT IV : 
and for the following partial analyses : — 
DaU> of ntialypis. 
18th August 1900. 
nth July 1905. 
I.)etail.s of sample. 
Range of 4 samples 
referred to above. 
x\verage of ore at 
mine. 
Tonnage repreeented. 
601 
Analvst. 
H. H. Dains. 
11. D. Connell. 
Manganese ..... 
Iron ...... 
Silica 
Phosphorus ..... 
52-80 -59-00 
3-21— 4-41 
5-98—10-32 
0-07— 0-12 
55-25 
9-81 
0-12 
The fallowing may be taken as the ordinary range of the Kandri 
ores despatched : — 
Manganese . . . . . . . . . . 54 to 67 
I ron 3 to 5 
Silica 8 to 10 
Phosphorus O'OSto 0-12 
The characteristic ore of this deposit as mined in South Hill is the 
finely cryatalUne, nearly always containing a high percentage of braunite. 
When there is a fair amount of psilomelane present the ore is compact 
and hard, the psilomelane acting as a cement to the braunite. With 
smaller amounts of psilomelane the ore becomes more friable. This is 
well illustrated by the three analyses of specimens 982, 994 and 995 given 
on page 868. The hard variety 995 contained 36^% psilomelane and the 
two soft varieties 23% and nil, respectively. At a second visit to this 
mine in December 1906, it was found that the proportion of the soft, or 
rather, friable ores is increasing rapidly as the deposit is worked deeper. 
This points to the proportion of psilomelane decreasing with depth. An 
unfortunate result of this change in physical character of the ore is that 
the percentage of ore wasted is increasing very rapidly with depth ; 
for a considerable proportion of the ore breaks down into a fine powder 
when it is handled. As this powdery ore is usually of very high grade 
it is a pity that a market cannot be found for bagged ore.i 
In South Hill these soft and hard ores seem to be arranged in layers 
one on top of the other, parallel to the surface of the deposit, and often to 
pass one into the other. They frequently contain dark brown sooty 
films along cracks. At the very top of South Hill near A, the ore often 
1 S3S Trjns. Min.O ol Inst. JnHa I, p. 224, (1997). 
