▁of ▁sab ot age ▁by ▁some ▁of ▁the ▁min ers ▁against ▁the ▁advent ur ers ▁when ▁in ▁an ▁attempt ▁to ▁reduce ▁the ▁mount ing ▁losses , ▁a ▁new ▁mine ▁captain ▁im posed ▁what ▁amount ed ▁to ▁a ▁tax ▁on ▁their ▁ear nings . ▁According ▁to ▁newspaper ▁reports ▁at ▁the ▁time ▁the ▁min ers ▁set ▁about ▁" att empt ing ▁to ▁blow ▁up ▁the ▁bo ilers , ▁lay ing ▁tra ils ▁of ▁[ gun ] pow der ▁about ▁the ▁bar ra cks , ▁setting ▁fire ▁to ▁the ▁clothes ▁in ▁the ▁dry , ▁throwing ▁large ▁pieces ▁of ▁iron ▁in ▁the ▁p umps , ▁and ▁other ▁villa in ous ▁acts ." ▁The ▁mine ▁closed ▁down ▁shortly ▁afterwards . ▁ ▁In ▁the ▁ 1 8 5 0 s ▁the ▁water ▁drawn ▁from ▁the ▁mine ▁was ▁being ▁used ▁for ▁the ▁steam ▁engines , ▁but ▁it ▁was ▁so ▁cor ros ive ▁that ▁each ▁year ▁six ▁of ▁the ▁twenty ▁four ▁bo ilers ▁had ▁to ▁be ▁renew ed . ▁It ▁was ▁not ▁until ▁ 1 8 6 2 ▁that ▁a ▁supply ▁of ▁clean ▁water ▁was ▁arranged ▁to ▁solve ▁this ▁problem . ▁The ▁last ▁significant ▁production ▁of ▁co pper ▁ore ▁from ▁the ▁mine ▁was ▁in ▁ 1 8 6 6 ▁( 1 , 6 3 0 ▁tons ), ▁though ▁it ▁sold ▁small ▁amounts ▁( less ▁than ▁ 1 0 0 ▁tons ) ▁in ▁each ▁of ▁the ▁following ▁three ▁years . ▁In ▁ 1 8 7 3 , ▁in ▁the ▁middle ▁of ▁the ▁sl ump ▁in ▁co pper ▁prices , ▁the ▁mine ▁was