308 On the formations of the 



stripes in it, wherever it can be seen above the surface, is 

 always nearly North and South, or about 15° N.E. generally, 

 and in the same formation; the few schistose rocks which 

 occur in it, have their lamination always vertical and exactly 

 corresponding with the direction of the stripes of the granite. 

 It can also be observed, that these schists are only modifica- 

 tions in the structure of the granites, from possessing a fissility 

 parallel with the stripes. 



In Mysore the granite is exposed in flat surfaces, some- 

 times of considerable extent; but in the Barramahal the 

 masses of granite are either so conical, or else in round glo- 

 bular masses, that it is not easy to see any particular direc- 

 tion in the stripes if such exists, and the schists also are 

 much contorted ; but generally, where they are found with a 

 regular lamillar structure and vertical, the direction is North 

 and South; and as in Mysore the schists are certainly mere 

 modifications of the granite, I do not see any good reason 

 why they should not be so considered also in the Barra- 

 mahal. 



The beds of gneiss generally occur below all the other 

 rocks of the schistose series, and nearest the granite ; and 

 the graduation between them and the other rocks is cer- 

 tain; but to prove with certainty the graduation between 

 the gneiss as a formation and the granite, would be a very 

 difficult point, and much laborious examination must be 

 necessary before we can assume as certain a point of so much 

 consequence. 



The arable soils which lie upon the surface of this forma- 

 tion are of very inconsiderable depth, seldom more than a 

 foot or so. They are produced by the disintegration of the 

 soft rocks of the surface, which generally yield easily to the 

 native plough, and in consequence, we always find the colour 

 and composition of these soils to answer perfectly to that 

 of the rocks below them. 



Of these soils there are four varieties : — 



