PERU. 



269 



The miner who can raise ores in considerable quantities, which will 

 give ten to twelve marcs per box, does well. 



The produce of the mines since the close of the revolutionary war 



has amounted to the following, viz. : 



In 1825, 



228 bars, 



1826, 



818 



1827, 



1068 



1828, 



922 



1829, 



359 



1830, 



457 



1831, 



635 



3 832, 



994 



1833, 



1133 



1834, 



1142 



1835, 



1148 



1836, 



991 



1837, 



1172 



1838, 



1172 



1839, 



1210 



weighing- 



MARCS. 



oz 



56,971 



6 



163,852 





221,707 



7 



201,338 





82,031 





96,265 





135,139 



3 



219,380 



5 



256,333 



2 



267,363 



4 



276,813 



2 



244,404 



1 



234,785 



3 



248,022 



6 



279,260 



3 



To this may be added one-fifth for silver that has not paid duties. 



The first adit of importance driven into the mines was that of San 

 Judas, which passed the wall of the vein of Zauricocha in the year 

 1794. By means of this adit, very rich ores were raised, especially 

 from the king's mine. In the year 1808, the present deep adit, from 

 which so much was expected, was begun ; for covering the expenses 

 of constructing it, the body of miners imposed a duty of one real per 

 marc on all silver melted in the government assay-office. This adit 

 reached in 1830 the southwest edge of the metalliferous ground of 

 Santa Rosa, up to which time the whole of its course had been in a 

 hard rock. An auxiliary adit was then commenced, fifty-four feet 

 above the level of the main one, and both of these works have been 

 carried on until the present time. The ground above being better 

 adapted for driving in, the upper adit is in advance of the lower, one 

 thousand five hundred feet, and has arrived at the district of Cayac. 

 The lower adit has reached the mines situated upon the vein of Zauri- 

 cocha, without having cut a single vein or deposit of ore in its transit. 

 There are several rich mines a little in advance of this adit, some of 

 which have been hitherto drained by hand-pumps, and which must be 

 shortly very much benefited by it ; for, although they extend below the 

 level of the adit, yet they will have some fifty feet of pump-lift less. 

 It will excite some wonder that steam is not now employed in the 

 draining of such valuable mines. It has, however, been tried ; a few 

 years previous to the revolution, four steam-engines, of thirty horse 



X2 



