6lt
the palace; but no perfon can tell from whence they were brought. It has theappearance of quartz dained by copper; but is vitrifiable, per fe , in a moderate heat,and gives out no copper to the vitriolic acid.
The two fined (tones near Seringapatam are found at Kingalu Copalu, and CavaryCadu, both near the northern branch of the river. The former is a compactgranite, confiding of dark red felfpar, red and yellowifh quartz, and black mica.Some of the yellow particles appear to be felfpar. The prevailing colour is owingto the dark red minute particles of felfpar; but it alfo contains large concretions
of the fame done, which have a bright red colour.
I had a fpecimen refembling this brought me (I do not know from what place),in which the red felfpar predominated over the quartz, and the mica was in a very
fmall proportion. The grains are i'mall ; it is alfo a very ornamental done.
The done from Cavary Cadu may be called either a hornfione porphyry, or agranatine. Its bafis is a dark brown horndone, in which are imbedded grey, yellow,and red felfpars, and black dorl. Like the former, it is very compact.
The granite, of which the walls of Myfore and Nuzerbar haye been formed, isloofe-grained, and confids of glaffy quartz, green and black mica, and reddilh felfpar.The mica is in large quantity, and the felfpar in a fmaller proportion than ufual.
Specimens of a fine-grained granite were alfo brought me from fome quarry inthe neighbourhood, confiding of black mica, grey felfpar, and yellowifh brownquartz, which gives the predominating colour. It is probably, rather a gneifs thana granite, as a dratified appearance may be feen in one of the fpecimens; but, exceptin the rock, it is generally difficult to diftinguifh gneifs from granite.
At Kingalu Copalu is alfo found a very pretty, fine-grained granitell, confiding ofgrey felfpar and black mica. It is evidently of a flaty texture, and would be agneifs, if it contained quartz. It is of the kind of done called by Sauffure, rochefeuilletee, which feems to be a ufeful didindb’on.
Near the Durria Adaulut Bang, on the ifland of Seringapatam , are found nodulesof a done called madi cullu, which is fometimes ufed for making gun-flints; thefe,however, are of a bad quality. Better ones, called cheky muky, are faid to befound near a village, called Beii Cullu, about twenty miles north and wed fromSeringapatam . The madi cullu is evidently a horndone.
All thefe dones are very hard; yet the natives cut them into pillars, or flags,with tolerable facility. The fame perfons cut the dones out of the quarry, and after-wards work them up into the various fantadical fhapes that are given to them inHindu buildings. Good workers in done get from 40 to 50 fanams a month (fromabout il. 6s. 10id. to il. 13s. yd.) The drudgery is performed by common la-bourers. The granite may be cut by wedges in any direction, and to any length ?but there is always one direction, in which it is found to fplit eafied; a number offmall fquare holes, about an inch and a half in diameter, and four inches deep, arecut in the line by which the done is meant to be fplit. The work is performed by afmall deel punch of this fhape, which is driven in by a heavy iron mallet. When pithe rock or done is very long, or deep, thefe holes mud be almod contiguous; Ibut when the furface to be fplit is fmall, they may be at confiderable didances. VBlunt wedges of deel are then put in the holes, and each is druck upon in itsturn until the done fplits, which it does in a draight line to the very bottom of themafs or dratum. The furface is cut fmooth with deel chifels, and, except in the veryfined works, receives no higher polifh. When a marble polifh is to be given, it isdone by rubbing the done with cakes made of the adamantine fpar, reduced to
4 1 2 powder,