NELLORE COPPER WORKINGS. 



83 



difficulty of cartage to the canal and coast could be easily got over. A 

 good cart-track could be made for £20 per mile. 



" The field at Guramanapettah is within 9 miles of a public road, 

 which leads to the canal at Kavely, and the ore from Gorganpully could 

 be taken to Kamaputnam about 20 miles. A cart carries 40 maunds for 

 1€ miles per rupee, and boats can be had at Rs. 2-8 per ton to Madras." 

 I have only been supplied with small samples of the specimens 

 referred to above by Mr. Lavelle, the bulk of 

 these having been, I believe, sent to England for 

 assay; consequently no satisfactory assay of the ores could be made. 

 The samples were — 



A.— -Chrysocolla (in gametiferous schists, of which the garnets, though 

 small, might from their colour and transparency be called precious 



Ores obtained, 



B. — Copper glance (chalcocite), chrysocolla, malachite. 



C. — Chrysocolla, malachite and ferruginous red oxide P (Mysorin). 



D. — Copper pyrites, chyrsocolla and malachite in limonite. 



I\ — Copper glance with chrysocolla and malachite. 



G. — Copper glance, malachite and chrysocolla. 



And other specimens of the same kinds. 



An analysis 1 of the Nellore ores was made in 1836 by Mr. James 

 Prinsep, the then Assay Master of Calcutta, and he 

 gives the following results for three packets of 

 ore : — 



Prinsep's assay of the 

 ores in 1836. 





No. 1. 



No. 2. 



No. 3. 



Hydrated carbonate of copper ... 



52-4 



68-5 



317 



Sulphuret of copper ,,. ... 



00 



o-o 



63-0 



Sulphuret of iron ... ,,, 



2-1 



12"4 



do 



Oxide of iron ,., 



435 



251 



53 



Loss or excess 



20 



—60 



00 





1000 



1000 



100-0 



Madras Journ., Lit. and Sci., Vol. Ill, O. S., p. 154. 



( 191 ) 



