GEOGRAPHICAL DISTRIBUTION. 67 



malai and Arasiramani near Sankaridrug. 1 The writer thinks, however, 

 that it is not likely, judging by experience elsewhere, that the veins 

 traversing granite will be found to contain mica in paying quantity : 

 the proportion of large crystals is generally less and the veins more 

 expensive to work. 



Vizagapatam. 



According to the District Manual (p. 155) mica occurs near Kodur 

 in this district ; but the kind and quantity are not given. 



Specimens sent by M. M. Ry. M. V. Suryanarayana Rau, proprietor 

 of the Waltair Estate, were examined by the writer and found to be 

 phlogopite in even sheets, 4 to 5 inches in diameter. The peculiar 

 properties of the mineral are referred to elsewhere (p. 23). 



Permission to work mica has also been granted in the following 

 districts of the Madras Presidency ; but mining does not appear to 

 have been so far profitable : — 



Bellary district.— Rampuram in the Rayadrug taluk. 

 Cuddapah district. — Polapolu in the Madanapalli taluk. 

 North Arcot district. — Gollapalli and neighbouring villages in 



the Chittoor taluk. 

 Trichinopoly district. — Shemmalai and Sigamkaradu in the 

 Kulitalai taluk. 



MYSORE. 



The State of Mysore is composed entirely of crystalline and trans • 

 ition rocks, through which, at various places, pegmatites are intruded 

 and occasionally carry mica of marketable quality. The most promis- 

 ing localities appear to be in the Mysore district, particularly in 

 the neighbourhood of French Rocks, where clear muscovite sheets, 6 

 inches square, have been obtained ; near Attikuppa and near Yelawal, 

 where larger, but less valuable, mica-crystals have been found. The 

 Hassan and Shimoga districts also contain deposits worth further 

 prospecting, though they have so far yielded very little mica of value. 



1 Provisional Index, 1896, p. 16. 



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