LADAKH, NORTH-WESTERN "HIMALAYA. 313 



high up on the peak named Mango-Gusor (20,635 feet) there 

 occurs a greenish-yellow calcareous serpentine, fragments of which 

 are found fallen into the ravines below. This rock, which appears 

 to be similar to the one from the presumed Ruling series of the 

 upper Wardwan valley, is extensively sought by the Shigar people 

 for the manufacturing of small cups, etc., and will be further alluded 

 to in the chapter on economic geology." 



The occurrence of the rock in the upper Wardwan valley is re- 

 ferred to at page 150 of the Memoir as follows : — " Between the pass 

 and Rangmarg, in the upper Wardwan valley, there occurs on the 

 right bank of the river another mass of the same granitoid-gneiss, 

 overlain to the south and west by dark slates and the characteristic 

 supra-Kuling rocks. These slates contain bands of a greenish ser- 

 pentinous rock identical with a similar rock underlying the supra- 

 Kuling series of Shigar, and it is accordingly presumed that these 

 rocks are the partially altered Ruling series." 



The passage in the chapter on economic geology alluded to in 

 the extract given above is as follows : — u From a calcareous ser- 

 pentine or verd antique occurring in the (probably) Ruling rocks of 

 the neighbourhood cups and small vases are extensively manufactured 

 at Shigar, in Baltistan. The rock is locally known as yesham, or 

 jade, and is of bright apple-green colour, sometimes shading off to 

 yellow, or bottle-green. A specimen of one of these cups, presented 

 by the present writer, is in the Indian Museum and another presented 

 by Mr. Drew, in the Geological Museum, Jermyn Street." (Mem- 

 oirs, Geol. Surv. Ind., Vol. XXII, p. 339.) 



The hand-specimen in the Calcutta Museum, No. 4-210, is coloured 

 on the weathered surface a dull greenish-yellow inclining, on 

 freshly broken faces, to a pale sulphur yellow. Its specific gravity is 

 2*48 l and its hardness 5. 



In order to compare the rock with the typical bowenite from 



1 1 am responsible for this determination and for the specific gravity of Nos. 8 — 280 

 and 8—294. I operated on pieces of suitable size with the aid of a Chemical balance. The 

 Sp. G. of the other specimens was determined in the Geological Survey Office, Calcutta. 



( » ) 



