870 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IV : 
It is necessary to suppose that the psilomelane consists entirely of 
Mn9Mn05, because if the AIqOs, BaO, etc., be converted into mangan- 
ates, as was done in the case of No. 995, there is a deficit of 1 • 14% of 
oxygen. A still less probable arrangement of the above analysis shows 
the ore to contain 18-90% hausmannite and 6-95% manganates of Al, 
Ba, Mg, and H, in place of the psilomelane ; this arrangement, however, 
has the advantage of leaving only 0'18% oxygen unused. 
The analysis of the third ore No, 994 can be re-arranged in the two 
following ways : — 
Soft ore toith scricitic films — No. 994. 
A. B. 
Apatite 
Calcite 
1-13 
0-16 
Apatite 
Calcite 
1-13 
0-16 
Braunite : — 
Si02 . 
]\In() . 
Mn203 
Fe203 . 
. 8-06 
. 9-47 
. 60-71 
. 2-55 
Braunite : — 
SiOo 
MnO 
Mn203 . 
Fe203 . 
8- 06 
9- 47 
46-32 
17-12 
80-79 . 
80-79 
80-97 . 
80-97 
Hematite . 
Quartz 
Water hydrating 
matite 
part of he- 
14-57 
1-20 
1-00 
Mn203 
Quartz ..... 
Water hydrating part of 
MnzOz 
14-39 
1-20 
1-00 
Impurities : — 
AI2O3 . 
BaO . 
CaO . 
MgO . 
AS205 . 
. 0-13 
. 0-21 
. 0-62 
. 0-2.5 
. 0-012 
Impurities : — 
AI2O3 . 
BaO 
CaO 
MgO 
AP2O5 . 
0-13 
0-21 
0-62 
0-25 
0-012 
1-222 
1-222 
1-222 
1-222 
Moisture (at lOO'C.) . 
0-10 
Moisture (at 100°C.) . 
0-10 
1'otal 
100-172 
Total 
100-172 
Of these A is perhaps the preferable interpretation ; for Mn203 
has not been yet obtained as a definite mineral, except doubtfully. 
