6 
MANGANESfi DEPOSITS OF INDIA : INTRODUCTION. [ PaRT I : 
general account of the deposits of each type would have been sufl&- 
cient. Almost every deposit, however, has its own peculiarities and 
interesting features, structural, mineralogical, or petrological ; whilst 
such details of the structure of each deposit as can be given will be 
very useful to the mining commimity, in helping to the rational develop- 
ment of the deposits. In the mineralogical section I have described 
several new species and varieties of minerals, in sufficient detail to war- 
rant the bestowal of new names ; most of these descriptions are, however, 
incomplete ; but I hope that it may be possible in the future to investi- 
gate some of the many points that still require elucidation. There are 
several other minerals that are probably new, but which I have not been 
able to examine in any detail. Nevertheless for the sake of convenience 
and future reference, I have given an account of their characters as far 
as they have been determined ; these points may require some modifi- 
cation when the minerals are examined in more detail. During the 
microscopic examination of thin sections of the rocks, I detected several 
other minerals that were not visible macroscopically, and could not 
be identified at the time. Whether they are new minerals, or previously 
known but rare minerals, has not been determined. They are not 
mentioned in this Memoir. As the fulness of the mineralogical treat- 
ment might render this work less useful to mining men, and prevent it 
from being of use to them in the identification of the minerals they find, 
I have inserted at the head of each of the more important minerals 
a short account of its chief features as given in Dana's System of 
Mineralogy, 6th Edition, and appendices.^ Further, I have added a 
chapter on the identification of the Indian manganese minerals, which 
will, I hope, enable anyone with a little mineralogical knowledge to iden- 
tify the minerals commonly found in the Indian manganese-ore 
deposits. The treatment of the economic side of the subject is not as full 
as I should have liked, particularly with regard to the details of costs of 
working and despatch to the smelting centres ; but that the mining 
community should often be reticent on these points is not surprising, 
considering the keen competition that exists in the manganese industry. 
Such information as I possess relative to the economics of the subject 
has been obtained through the courtesy of the 
Acknowledgments. . , p .i • • 
various members oi the mmmg community, com- 
panies, syndicates, and individuals. Further, I must express here my 
indebtedness to the various companies and syndicates for the permission, 
1 It is this edition of this well-known work that I shall refer to as Dana's Mineral, 
ogy in the body of this Memoir. 
