so 



Remarks upon the Auriferous Deposits of India. 



[July 



] 30. Dark brown calcareous rock, structure passing from earthy to 

 that of a line indurated clay, associated in thin overlying beds with 

 the plumbiferous limestone of Yungumrazpilly. It imbeds whitish 

 tubular bodies, lined with minute whitish crystals (organic exuviae ?). 



131. — Do. do. with quartz and decomposing iron pyrites. 



132. — Nodule of iron ore (magnetic) from Kunchgarlconda, Nellore, 

 granular metallic lusire ; colour brownish black, streak brown, opaque, 

 fracture uneven, infusible before the blow-pipe, /)er ^e, with borax it melts 

 into a green glass. 



133. — Quartz rock— Udeghirry Droog. 



134. — Asbestus, in masses of fibres, passing from a dull greenish grey 

 to a yellowish white mottled colour, with a slight soapy feel. Tough 

 under the hammer, and breaks into fibrous woodlike fragments, which 

 are not flexible in an unseparated state. It is found in a bed at Putsa 

 Marculpilly, near Rayel- cherroo. Ceded Districts, in limestone, associated 

 with a white indurated magnesian clay or earth. Before the blow-pipe, 

 it fuses into a greenish grey enamel, which by a continuance of the re- 

 ducing flame is converted into a brown slag. 



135. — Magnesian earth indurated, associated with the above — same 

 locality. 



136— Indurated earthy vein in mica slate — Bungeral Mettah, Nellore. 

 Colour faint reddish, white with scales of mica disseminated, eflTerves- 

 cences feebly with acids. 



Actynolite, carbonate of magnesia, and kyanite, occur in the mica and 

 hornblende schists of the Nellore mining district, also a magnetic iron 

 sand which is smelted, and abundance of hematitic iron ore. The soil 

 often presents a sterile waste from the saline eflervescences of the 

 mineral alkali ; muriate of soda, and saltpetre, often attending metalliferous 

 development. 



III. — Bcwarlis upon the Anrifei'ous Deposits of India, considered with 

 especial Reference to tlieir Economical Value.— By Frederick Burr, 

 Esq. 



]My attention having some years ago been 'directed to the geological 

 structure and mineral capabilities of India, one of the facts which then 

 struck me with regard to the latter subject, was the very extensive oc- 



