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_a_ <br />RECuL,::lEPLAT IONS. <br />1. T~'tl:e collar of shift o: sufficient height to prevent <br />persons from felling shaft. <br />2 Pro••ide mine ;or a de~~ice for thawing po~:der. <br />3. Post sirnals end notices ac~ordinr to law tit collar <br />of shaft aad levels. <br />4. Pro~•ide the ledder•we;; r~i`h landinra not to exceed <br />20 feet tpart. <br /> <br />