xlvi Proceedings of the Asiatic Society. [June, 1846. 



Geological and Mineralogical. 



Dr. Bradley, Nizam's Service, Ellichpoor sends us some concretions which he 

 supposes to be coprolites, and adduces them as " one of many corroborative proofs 

 that their sandstone rocks are identical with the new red sandstone of England. ' ' 



I find, on dissection with dilute muriatic acid, that the grey ones are now merely cal- 

 careous concretions of silica and apparently fragments of flint, and the red ones fer- 

 ruginous concretions, also of siliceous matter, coloured almost to heliotrope by 

 peroxide of iron, but yielding this after some days digestion in muriatic acid. The 

 white concretionary matter is apparently also siliceous, as these red specimens give 

 but very little effervescence. 



I am thus on the whole (and especially by comparison with our own specimens 

 from Dr. Buckland) inclined to think that these are not coprolites, nevertheless I 

 would not speak positively at present. 



Dr. Bradley has also sent us a specimen of a silicified substance which he thinks 

 must once have been an organic body, and he states that Professor Orlebar, of 

 Bombay, also agrees with him in this opinion. It is at present a pure chalcedony, 

 whatever it may formerly have been. 



I have the pleasure to announce a valuable addition to our collection in a 

 meteorolite of a good size, discovered amongst a pile of specimens, without labels 

 or numbers, in the Coal Committee's collections, which I have been busy in 

 arranging. I trust to obtain yet some notice of this valuable treasure, which for us is 

 truly one, for it is of a kind which we had not yet so perfect in the curious mar- 

 bling which it presents on fracture. I have not had time to look for the different 

 descriptions of these substances so as to see if any are described resembling it. 



Museum or Economic Geology. 



As I have only been convalescent in the latter part of this month I must defer 

 till the next report noting what I have been able to do. 



For all the presentations and communications the thanks of the So- 

 ciety were accorded. 



