lxiv Proceedings of the Asiatic Society. [July, 1846. 



The oxide of cerium was also obtained independently by Laugier's process, as 

 given in the last edition of Turner's Chemistry, so as to leave no doubt of its 

 identity. 



The mineral thus appears to be a triple carbonate of iron, lime and cerium, the 

 mixture of galena being merely fortuitous and visible to the naked eye. I assume 

 the combination of the three first to take place, as they are usually found in the 

 common cerite, which our mineral probably is. It is certainly none of the fluates of 

 this mineral. 



I have not yet been able to ascertain if the combination is in definite proportions, 

 but I think it not improbable that the orange brown nests alluded to are the crys- 

 tallised mineral. 



Report on the ore of Lead and Antimony sent by Lieutenant -Colonel Ouseley from 

 Hisato, C/iota Nag-pore. 



Lieutenant-Colonel Ouseley, at my particular request, has sent not only the ore in 

 large lumps, but also specimens of the rock' matrix, and other rocks and minerals 

 found in the neighbourhood of this vein, and all these I have carefully examined, 

 so that nothing of importance could, I think, escape us. 



J . Judging from the masses we have, which are tolerably large, the vein appears 

 to be composed of crystalline quartz in a few places, and in and near this the ore 

 appears purest, but the greater part is an opaque, granular, and loosely aggregated 

 quartz, mixed up with innumerable masses of crystals and grains of the antimonial 

 galena, with minute masses and cubes of common sulphurets of copper and iron, 

 and in some few places of white iron pyrites.* The silex in many parts is deeply 

 tinged with iron, and sometimes almost assumes the appearance of Bronzite from 

 the ferruginous impregnation. 



It was evident that such an ore and matrix might contain silver in quantities 

 worth working, and also that if care were not taken to take good averages, and these 

 from various parts and separate specimens, the silver might be overlooked. Thence 

 has arisen the necessity for close and repeated examination of all the various parts of 

 the ore to be well assured we were not overlooking what we were seeking for ; since 

 from the distance of the vein from all roads and rivers it is only as an argentiferous 

 ore that it could have any value. 



For the same reason all the other ores and earths near the matrix have been care- 

 fully examined. They are as follows : 



Black scaly mica, and micaceous earthy matter. 



Brown iron ore, and ferruginous earths of several kinds. 



Jaspery iron ore in bands. 



Red and Yellow Ochre. 



Greenish Clay. 



* These last mostly occur in the neighbourhood of a few nests of vhomboidal limestone 

 which are found in the quartz. 



