MINERAL STATISTICS 



249 



The Produce of the Copper Mines of Cornwall from the year 1725 to 1800, in periods 



of ten years. 



From 1838 the following may be received as an exact statement of the progress of 

 the copper mines of Western England. The accounts are made up to June 30 in each 

 year specified : 



After this period the quantities given are those produced in the year ending December 31. 



The following summary for the United Kingdom for the period, ending 1873, will 

 show the falling off in the production of that metal : 



1 The produce of the mines for the years 1789 to 1794 cannot be obtained. 



Years . . 1786 1787 178"8 1704 1795 



Tons . . 39,895 38,047 31,541 42,815 43,589 



Amount . . 237,237?. 190,738;. 150,303;. 320,875?. 826,1891. 



8 This includes the last five years of the last century only, 



