892 Asiatic Society. [No. 129. 



Read the following letter from the Curator of the Museum Economic 

 Geology. 



H. Tor r ens, Esq. Secretary, Asiatic Society. 



Sir, — Upon examining the official reports of the late Dr. Voysey, I learn, that 

 with that of 8th August 1821, (Cons, of 2ist August 1821 ,) he forwarded a Geolo- 

 gical Map, which was soon after sent to the Honorable the Court of Directors. No 

 record appears of any copy having been made to retain here. 



I beg therefore to suggest, that the Society apply to Government to obtain for 

 us copy of this and any other of Dr. Voysey's Maps or Plans, as being documents of 

 the highest possible importance to us, and in fact, almost the only existing materials 

 we have for a Geological Sketch Map of much of that part of India. 



I am, Sir, 



Your obedient servant, 



H. PjDDINGTON, 



Curator Museum Economic Geology. 



A copy of the foregoing letter was forwarded to the Secretary to the 

 Government in the General Department, on the 27th August last, with a 

 request that copies of the Geological Maps of Dr. Voysey alluded to, may 

 be procured from the Honorable the Court of Directors, for the use of 

 the Museum Economic Geology. The Secretary reported, that assurances 

 had been held out for a compliance by the Government with the request 

 of the Society. 



Read the following report from the Curator Museum Economic Geology : — 

 Report of the Curator Museum of Economic Geology for the month of August. 



Museum Economic Geology. — I announced in my last report an ore received from Major 

 Ouseley, Agent to the Governor General S. W. Frontier. As I supposed, it has proved to be an 

 argentiferous ore, of sulphurets of lead and antimony in varying proportions, with iron pyrites in a 

 quartz matrix. I obtained from 500 grains of the ore, fairly taken as an average, one and a half 

 grain of muriate of silver, equal to one grain of pure silver. This would give about 70 oz. of pure 

 silver to a ton of well picked ore, which in England would be worth working. I have written to 

 Major Ouseley for more specimens, (those sent being merely the out-crop of the vein,) when we may 

 perhaps find ores of a quality better worth attention ; the presence of the antimony being a 

 favourable indication. 



We have received from Miss Lloyd, (Darjeeling,) a white earthy powder found in the bed of 

 one of the mountain streams, and used by the Lepchas to whitewash their houses. Upon 

 analysis, this substance is found to be composed of 



TCarbonate of Lime, 



Carbonate of Magnesia, 



In 100 Parts -^ Alumina, ... 



Silex, 



Llron, 



100.00 



... 55.20 



... 19.04 



... 6.00 



... 8.00 



... None 



98.24 



.. 1.76 





