206 Proceedings of the Asiatic Society. [No. 2. 



I have once before recorded (Proceedings for March, 1847, Journal 

 Vol. XVI. p. 382), an instance in which this milky luminous appearance 

 was seen off the Cape of Good Hope, and Dr. Buist in the transactions 

 of the Bombay Geographical Society has also recorded an instance in 

 which a Company's Steamer from Bombay to Aden passed through a 

 large extent of it ; and it is I think mentioned also in Horsburgh and some 

 modern books of voyages ? but we are so ignorant to what it can be owing, 

 that every accurate notice of it is worth registering. If we could obtain 

 some bottles of the water, carefully put up and corked, we might perhaps, 

 between chemical testing and the microscope, arrive at some results worth 

 knowing ; unless the appearance be a purely electrical phenomenon ? 



Miner alogical. — We have received from Rev. Mr. Phillips a specimen 

 of Sulphate of Barytes from Landour and of saccharine Gypsum from 

 Mussoorie, both of which from their localities are acquisitions. 



Economic Geology. — We have to announce here the discovery of cop- 

 per ore within twenty miles of the station of Darjeeling. 



The letters from Dr. Campbell are as follows : 

 No. 45 of 1854. 

 To 



H. Piddington, Esq., 



Curator Museum of Economic Geology, Asiatic Society, Calcutta. 

 SiE, 



On the 29th ultimo, I had the pleasure of sending to you by letter dak, 

 a speciinen of copper ore from Chakoong in Sikim, and of the copper 

 extracted from it. 



2. On the first instant, I despatched to you by dak banghy a specimen 

 of copper ore from Pushak in the British territory attached to Darjeel- 

 ing. 



3. May I request that you will favour me with a report on these 

 ores, and the metal. 



4. Since the despatch of the specimens to you, I have visited the Pushak 

 district. Annexed is copy of a letter from me to the Secretary to Go- 

 vernment of Bengal on the subject for your information. The locality of 

 the copper ores of Pushak is at an elevation of 2,000 to 2,500 feet above 

 the level of the sea. The rocky belt containing the ore runs generally 

 east and west. There is a deposit of tufa lime close to one of the cop- 

 per veins. 



A. Campbell, 



Superintendent. 

 Supt. Office, Darjeeling, the 7th January, 1854. 



