CiiAi>. XXXVI.] 
N AGPUR : BELDONGRl. 
90? 
The following analysis is of a ])icce of variety No. 2 and was carried 
out at the Tmperial Institute — 
Spcciiiiiii So. 1071, 
Maiiganeso peroxide . . ...... (i(J 
MaiiRHncse protoxide ......... 20 
Ferric o.xidc ........... 2 
Alumina ...........() 
l^aryta 0 
Lime ......... .1 
jMaeiicsia ........... 0 
Silica ( combined) 
Silica (free) . 
Pliosplioric oxide 
Atsenic oxide 
('oinl)ined water 
Moisture at 100°C. 
Carbon dioxide 
•()() 
•84 
•20 
•38 
•01 
•33 
•32 
•()() 
•OS 
•007 
TjS 
•20 
•05 
100-207 
Specific i;ravity 
This is equivalent to 
Manganese . 
Iron . 
Silica . 
Phosphorus . 
l\Ioisturc 
4-26 
58 -95 
1 •!•!) 
5-32 
0 -035 
0^20 
Stated ill teuns of its niiueralogical coaiijositinii the analysis is as 
follows : — 
Apatite 
Calcite 
Braunite 
Psilomelane : — 
Fe4(Mn05)3 
Al4(Mn05)3 
Ba2Mn05 
Ca2Mn05 
:Mo2:\In05 
HiMnOs 
Mn2Mn05 
5^58 
©•05 
0 51 
1 •()3 
0^75 
9^82 
27 -82 
0-18 
Oil 
53 31 
Arsenic oxide 
Moisture 
46 ^76 
40 •76 
0 -007 
0^20 
Subtract oxviren absu.ii 
100 -507 
0^30 
100^207 
1 The following addit i(/iiiil con.stituc'iU 
NiO, C03O4. TuO .... 
K2O 
in this oic liave since been determined — 
0 -020 
0 12 
