1839] 



some oilier portions of Mysore. 



99 



establishment of the Wesleyan Missionary Society. A small village is 

 built upon this kind of laterite, which differs much from that on the 

 western coast, but is somewhat similar to some specimens obtained at 

 Coorg, In some places, as towards the west end of the cantonment, 

 near the very last building appropriated for the stand of arms of a 

 native corps, a thick bed of pebbles is seen below the soil, forming 

 what Dr. Benza would call a lateritic or quarlzy detritus. 



The highest hills in the immediate neighbourhood are about 4 or 5 

 miles from the fort to the south of the Kingaree road— these hills run north 

 and south, and are of gneiss and granite with occasionally hornblende slate 

 in the declivities. Hornblende slate is found in several spots jutting out of 

 the soil, chiefly on the west side, its principal locality is in the direc- 

 tion of Kingaree, and near the high hills just spoken of. Basalt is 

 pretty common either in dykes or veins, and, also chiefly to the west, 

 trap dykes the same. These last I shall now describe, but it may be 

 as well first to observe, that there are four principal roads leading 

 into and out of the cantonment — the east or Madras — the south-west 

 or Seringapatam— the south or Trichinopoly and the north or Nundi- 

 droog and Bellary. Besides these, there is one about due west, lead- 

 ing to Severndroog, and another about north-west leading to Sera and 

 Chittledroog. 



About 8 miles on the Madras road, close to a village and val- 

 ley where there is much kunkar, and from whence Bangalore is 

 chiefly supplied with chunam, there are several hornblende rocks 

 near the road, and a range of the same is observed running about north 

 and south. This range of trap rocks runs for many miles. On descend- 

 ing the last hill but one on the same road, before entering the village 

 of Ulsoor, and about a mile and a half from it, a trap dyke is observed 

 on the right-hand side. If we now leave the road and turn off to the 

 left in a southerly direction, on a line with this dyke and about half 

 a mile from it, we come upon some black rocks of basaltic hornblende, 

 the continuation of the dyke seen near the road. This basaltic horn- 

 blende almost in some of the specimens passes into basalt, and a large 

 gneiss rock a few yards distant from this trap dyke has a basaltic dyke 

 cutting through it — the strata of the gneiss about north-east and south- 

 west, and the dyke north-west and south-east or more correctly N. N. W, 

 and S. S. E. The basaltic dyke in length is about 78 paces— its 

 greatest breadth about 2 feet, and the least about six inches — towards 

 its smaller end a vein of basalt is seen running parallel with it. 



We will now take a jump geological and transport the observer to the 

 west end of the cantonment, placing him in a road which leads from the 

 Infantry review ground to the pettah. This road is lined on each side 



