Chap. XXXIII.] bhandara: miragpur. 
749 
few pieces were psilomelane, sometimes mammillated. The analysis 
carried out at the Imperial Institute shows : — 
Manganese peroxide , 
Manganese protoxide 
p^erric oxide 
Silica (combined) 
Silica (free) 
Phosphoric oxide 
Moisture at 100° C. 
This is equivalent to 
Manganese 
Iron 
Silica 
Phosphorus 
Moisture 
Snm plv N 
54. 
50-34 
2.3-17 
12-4!t 
5-07 
0-82 
0 20 
0-34 
40-81 
8-74 
5-89 
0-09 
o-:54 
and indicates that the ore contains, on the average, about equal parts 
of braunite and psilomelane. 
Mr. H. D. Coggan has kindly supplied me with the following analyses 
representing the average quality of the ores extracted during 1906 and 
1907 :— 
1906. 
1907. 
Manganese ......... 
51 -99 
53 
24 
6 
03 
0-076 
0 
-078 
During 1905, and since, this deposit has been actively worked. From 
The working of the ^^^'^ ^isit I sce that all the in situ portions 
deposit. of the deposit are a source of good ore. But in addi- 
tion to these all the ground marked in figure 45 as talus-ore is being 
made to yield large quantities of ore, owing to the fact that the fragments 
have been formed by the breaking up of the ore-bed in the positions 
where they now lie, so that the detrital deposits are very rich. The ore 
is sent to Tumsar Road Railway Station, Bengal-Nagpur Railway, over 
the Central India Mining Company's steam tramway, a distance of about 
29 miles. 
The output of ore from this deposit during 1905, 1906, and 1907 
Output. has been as follows : — 
«. Year. 
1905 
1906 
1907 
Long tons. 
0.55^ 
14.386 
34,300 
