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Show The 1 r.-IU.t 'Un au.l lie. Sri. nil. I. For the ufco of Illustrating the dllTrr-ence dllTrr-ence lstMcen the practical man and the ( riit, let us suppose two i-rrson 4o visit the northern iiculnsuU, of Michigan eei king fur iron. The one runs aloic blindly, takia np with every goal show, and mines. Tint remit Is, Ihi cither niakca a happy strike by jnero accident or spends tliousands of dollars In useless aearclu Tho other has studied tlio laws of electricity, elec-tricity, aud knonatkat certain ores of Iron are magnetic. Ho understands alw that theto ores will exert their Intliienco through any amount of aujs rim umt tit earth. Conseqnenlly he mrldes him-eelfnlthadlppliig him-eelfnlthadlppliig neidle and compass, and by the operation of these Ulls win re a bed Is located. Its approximate depth aud prolieblo amouutcf luatiriab To prelentlalng deceived by the magnetic cldsts In that n-glon, by lneans of hla dipping needle an 1 compass he traces up the Uil until he finds nn outcrop. Thus liaro been locateil, at little ei-pene, ei-pene, many of the mining regions of that locality. What an achlowirent is this, aid how much better than tho I llnd guesses of the so called practical man! W.I I Hinlth, M. D. in 1-snular hekneo Monthly, |