Chap. XLT. ] banoalore district. 1119 
111 (juality. as in inodc of origin, the Mysoro oros bear considerable 
roseniblance to those of Sandnr. That is, they 
are comparatively low in manganese, so as to 
be classed as 2nd and :Jrd grade ores, correspondingly high in iron, and 
low in silica and phosphorus. When the ores are not carefully picked, 
however, the silica percentage may at some deposits easily rise to a 
high figure. 
During 1900 and 1907 the following amounts 
Kx|JOlts. P • 1 
OT ore were raised : — 
1906. 
1907. 
Tons. 
Tons. 
Chitaldrug district ...... 
712 
3,125 
Shimoga district ...... 
40,773 
9G591 
Tumkur district ....... 
4,827 
13,091 
But no ore was actually sent away from the Chitaldrug district in 1906. 
During 1907 ore has also been despatched from the Chitaldrug and 
Kadur districts. The port of shipment for all the manganese-producing 
parts of Mysore is Mormugao in Portugese India, the ore being railed 
over the Southern Mahratta Railway. In the future, however, a certain 
proportion of the ore may possibly be railed eastwards to the port of 
Madras. 
Bangalore District. 
Specimens of 'iron ore and manganese in alternate strata ' and ' brown 
wad and brown fibrous manganese ' from Bangalore were shewn at the 
Madras Exhibitions of 1855 ^ and 1857;2 and at that time black earthen- 
ware was manufactured at Bangalore from a 'fine dense clay that contains 
both manganese and iron '.3 Recent analyses4 of gneiss from Bangalore 
show 2-69 to 2-71 per cent, of manganese protoxide (MnO). Columbite, 
a niobate and tantalate of iron and manganese, has been found by Mr. B. 
Jayaram^ in pegmatite about ^ a mile north of Masti. 
1 Reports by the Juries, p. C, (1856). 
2 Ibid., p. 2, (1857). 
3 Ibid., p. 120, (18o6\ 
♦ Rec. Mys. Gtol. Dept., II, pp. 30. 34. (1898-99). 
5 Ibid., Ill, p. 182, (1900-01). 
