CiiAi'. XXXVI.] 
NAGPUIl : 
MANSAB. 
887 
The two following analyses have been made on specimens from this 
depcsit. No. I0;57 was collected by me from an ore-stack on top of Man- 
sar Hiil and was a piece uf finely crystalline ore. It was analysed at the 
Imperial Institute. The other specimen was analysed by Mr. F. R, 
Mallet 1 and was apparently, abo, hard grey, finely crystalline, ore, con- 
taining some small cavities, which were many of them 'partially, or almost 
entirely, fdled by a translucent, light brownish-red and yellowish, in- 
distinctly crystalline mineral, which proved on examination to be 
rhodonite.' Tliis supposed rhodonite is really spessartite, as is shown by 
a specimen of this ore still in the Geological Museum, and as is indicated 
by the description of the colour given above. The analysis given below 
is that recalculated by Mallet so as to exclude the ' disseminated 
rhodonite ' and moisture. The Mn203 and surplus oxygen shown in 
Mallet's analysis have been, for the purposes of comparison, rearranged 
as MnOg and MnO. 
Analyses of Mansar ores. 
Manganese dioxide 
Manganese protoxide 
Ferric oxide 
Alumina 
Baryta 
Lime 
Magnesia 
Silica (combined) 
Silica (free) 
Phosphoric oxide 
Arsenic oxide 
Water (combined) 
Moisture at 1(X)°C. 
Carbon dioxide . 
Imperial Insti- 
tute 2 (Spec. 
No. 1037). 
Mallet. 
55-72 
28 • 55 
4- 39 
0- 64 
1- 49 
1- 24 
0-13 
5- 59 
0-36 
0-2] 
0-017 
2- 26 
0-10 
0-06 
52-81 
28-25 
9-87 
1- 21 
trace 
6-06 
0-21 
2- 63 
Total 
100-757 
101 -04 
Manganese . 
Iron 
Silica 
Phosphorus 
Specific gravity, G. 
57-39 
3-07 
5-95 
0-09 
55-27 
6-91 
6-06 
: 0-09 
4-68 
(3) 
Except for the fact that Mr. Mallet's analysis does not show alumina 
or baryta, it will be seen that there is a wonderful agreement between 
these two analyses, considering that they were made on two hand-speci- 
1 B e. G. f. /., XII, p. 73, (1879). 
2 The following additional constituents were determined later : — 
NiO, C03O4, CuO (chiefly C03O4) 0-020 
K2O 0-10 
Na20 0-16 
3 Three different samples were found by Mallet to have specific gravities of 4-22, 
4*36, and 4-46. 
