4W Scientific Intelligence, [Junb, 



X. Qjuantity of Copper raised in Cornwall. 



In Six Months, ending June 30, 1821. 

 The produce of 64 mines, of which the following are the six princi- 

 pal ones, viz. 



Ore. Copper. 



Dolcoath ,5679 tons 405 tons 



United Mines 4199 394 



Wheal Abraham, &c 4522 330 



Treskerby 2497 253 



Consolidated Mines 2508 207 



Pembroke... 1698 136 



21103 1725 

 58 other mines 24927 2082 



46030 3807 

 Produce of the ore, 8i per cent. 

 Price of copper, 107/. 6s. per ton. 



In Six Months ending Dec. 1821. 



The produce of 74 mines, of which the following are the six princi- 

 pal ones, viz. 



Ore. Copper. 



Consolidated Mines 6089 tons 540 tons 



United Mines 5191 487 



Dolcoath 5557 395 



Wheal Abraham 4417 342 



Pembroke 2079 190 



East Crinnis 1512 188 



24845 2142 

 68 other mines 27553 2565 



52398 4707 



General Return of Copper raised in Great Britain and Ireland, 

 One Year ending June, 1821. 



Tons. cwt. qr. lbs. 



Cornwall 7764 15 1 11 



Anglesea, about 500 



Devon 476 



Ireland, Wales, Staffordshire, 



Scotland, &c 740 2 2 16 



9480 17 3 27 



For similar statements for preceding periods, see Annals ofPhiloso* 

 phy, vol. i. New Series, p. 394. 



