CiiAP. XXXII.] 
BALAGHAT MINE. 
721 
then, as described on page 718, the band becomes much thinner, passing 
into limonite, so that there is soon only 5 feet or so of limonitic rock 
(with patches of hematite and manganese oxide) and jaspery quartzite 
resting on the underlying grit. Finally the band dies out altogether. 
Owing to the absence of any spessartite or other manganese-silicates 
we have here no examples of manganese-silicate 
Nature nnd ((iiality of passing into manganese-ore. True, the 
the ores. * , , , , , 
quartzites are often replaced by manganese-ore; but 
the quantity of such rock in which original quartz is noticeable is quite 
subordinate, and the main mass of the ore, when the bands of quartzite 
have been separated from it, is good compact ore, although a little 
of it is spoilt by small veinlets and nests of secondary quartz. On ac- 
count of the fact, for such seems to be the case, that these ores have 
not been derived from manganese-silicates by chemical alteration, 
braunite is to a large extent absent. In a few cases it occurs as sparsely 
scattered grains in psilomelane, whilst especially towards the Bharweli 
end of the deposit, the typical mixture of braunite and psilomelane 
is to be found in places. The main mass of the ore, however, consists 
of two varieties. One is typical dull grey psilomelane, sometimes con- 
taining cavities filled with black powder. The other is the very finely 
crystalline light grey ore that glistens brilliantly in the sun, and owing 
to its fine-grained homogeneous character is able to have impressed 
on it various physical structures resulting from pressure. It can be 
scratched fairly easily with a knife, the streak being black. A complete 
analysis of a piece was made by Messrs J. and H. S. Pattinson of 
Newcastle-on-Tyne, with the result given on page 93 of Part I, which 
proves it to be hollandite. The constituents of commercial importance 
are as follows : — 
S-pecimen No. 1146. 
Manganese . . . . . . . . 54*42 
Iron 3-10 
Silica 1-40 
Phosphorus 0-020 
At the bottom of the gravity incline No. 1 (see page 725) there 
was (in March 1904) a huge stack of about 7,400 tons of ore ready for 
loading into railway wagons. The ore consisted partly of the fine- 
grained light grey ore, partly of banded psilomelane, and partly of psilo- 
melane with the soft black spots. Several pieces of ore showed 
fUms or veinlets or white quartz ; but I understand the ore receives a 
final cleaning when being loaded into the wagons. A sample taken 
