614 
MANGANESE DEPOSITS OF INDTA : DESCRIPTIVE. [PaRT IV t 
Bengal. 
Burdwan District. 
No manganese-ores have been found in this district, but many of the 
iron-ores are manganiferous. 
Some analyses of manganiferous limonities and hematites by H. 
riddington, published in 1833,1 shew percentages of manganese oxide 
varying from 150 to 16*00. In one case the oxide is stated to be the 
red oxide (Mn304), and probably it is this form nf the oxide that is 
given in all the analyses. 
No. 1, 
No. 6, 
No. 7, 
Between 
No. 4, Mai 
Paolta 
Deser 
Jamde and 
Chaiti. 
Kanowa. 
Gerh. 
Sukraj. 
Water and carbonic acid 
8 -.50 
Water . . . 
6-0 
7-0 
6-0 
Silei (Si02) 
4-'00 
4-50 
7-90 
3-75 
Alumina (AI2O3) .... 
4-75 
1-75 
0-60 
0-50 
Carbonate of lime .... 
5-15 
3-35 
Lime ...... 
0-bo 
0-50 
Phosphate of iron .... 
Trace 
0-90 
Oxide of manganese (? Mn304) 
1-55 
16 -00 
10-252 
1-50 
Peroxide of iron (Fe203) 
68-00 
74-00 
86-00 
Deutoxide of iron {? Fe304) 
76-'00 
Total 
99-95 
99-60 
99-75 
99-15 
Metallic iron ..... 
55-0 
47-0 
51-8 
60-2 
It is evident from the figures that the above analyses are only approxi- 
mations as regards the numerals after the decimal point. 
I have been unable to find the position in the map of the above vil- 
lages, except that Jamde may be the same as Jamdah, and Deser Gerh 
the same as Dishargarh. 
Analyses of iron-ores from Barakar given by P. C. Gilchrist and E, 
RileyS shew from a trace up to 2*78 per cent, manganese protoxide, 
whilst two analyses of the pig made therefrom by the Bengal Iron and 
Steel Company show 0-69 and 0-97 per cent, respectively of manganese. 
1 Asiatic Researches, XVIII, pt. 1, pp. 171-177. (18.33); Glean. Sci., I, pp. 
295-298,(1829). 
2 Stated in the original paper — probably by a slip — to be manganese. 
3 Iron, XXVIII, pp. 476 8. (1886) ; Jovr. Iron Sted InH.. 1886. No. II. pp. 622- 
624. 
