Geography of the Himalaya!), Mountains. 29 



fervescence in distant points, water collects at about 50 feet, 

 in a mixture of clay and sand of a light yellowish grey. No 

 perceptible effervescence. 



The slope of the Rewarrie plain is northward, towards 

 which during the rains considerable streams flow, and are 

 lost, it is said, in the sands. 



The ranges of low rocky hills running from N. E. to S. W. 

 generally, which here make their appearance, are said to 

 commence a little to the northward of Honsi, and may be 

 considered as the first outskirts of the group of the hills of 

 the Deccan and peninsula. 



They are here commonly composed of clay slate, ot a 

 bluish and greyish black, too decomposable, and of a struc- 

 ture too little crystalline to admit of its being ranked proba- 

 bly amono- the primary or primitive classes; it seems to rest 

 upon a sp°ecies of mica slate, however, and is pervaded in 

 many places by veins, and contains very considerable beds of 

 quartz rock, and pure white quartz. 



In the vicinity of many of the veins the same alteration in 

 the structure of the slate, waving and contortion of the la- 

 minae, which have been noticed in similar rocks elsewhere, 

 is very frequent. The highest summit in this vicinity which 

 I have estimated, having then no other means of judging of 

 it at from 900 to 1000 feet above the plain, is composed ot a 

 very hard compact rock of a bluish-black colour, which ap- 

 peared to me to agree in its characters with that to which the 

 name of Lydian stone is given. On its slope flesh-coloured 

 quartz rock, sometimes slaty in its structure, and in ver- 

 tical layers, occurs sometimes spotted with large wmtish 

 macula,, in it is contained a very rich ore of iron, and to- 

 wards the lower parts of the bed where it reposes on the clay 

 slate, are cavities containing sometimes pretty large and per- 

 feet rock crystals incrusting them. These hills are gene- 

 rally naked and barren of trees, except stunted mimosa,, 

 Barleria prionitis and Justicia, the Caparis heterochta may 

 also be found among them, a scandent species : 



The Salvadora persica. 

 Mimosa; seerissa. 



i Farncsiacn. 



Arabica. 



