Show ai 6 ta I 1 nr fa 5 ZA waugh 9 h sinkers on 4 sha shaft t we are indebted to the porcupine mines limited schumacher ontario canada for permission to publish the accompanying photograph and data the total excavation for the Alc mcintyre INTYRE no 11 SHAFT will exceed that of any previous shaft for gold mining on the north american continent the excavation averages 17 by 24 ft and the ultimate depth will be approximately feet the MODEL 37 HAMMER was mas chosen for this shaft after careful competitive peti tive tests and the sinking Z speed of approximately feet per month completely tim timbered bared is a true index of the high drilling efficiency of this new sinker D ell 7 VE 51 W g oj DI LL L L f jj ju UP aj CE j aoa na P AA AV COLORADO 0 new yea clima sr louis sm sia fri ack anh maew cath ado Vi viat dah dahah M apao PO beaule vt sak acl kuA kli d Wil ailsto Sto e SC mr Hoak gel taa baftir aba base aud Po covme cavine jolin A aliw A C arv 6 CJ cf C J artam iu allce nr N r B arf kum efty LH LA mif r a A abos mexia COT sav sa v 11 ufa kiacz cary TD dna mke bilting ril ting st atik |