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i <br />„~ mhey obtain Yair ventilation through the main shaft. go <br />`~ noxious gases are met vritn. „ <br />The shaft is dvidzd into three ccmcartments, and is provided <br />j rrit= a ladder-r;ay, ^he ladders are safe, secure and accessible, <br />{! The ladder-Tray contains steam and crater pipes. There are landings <br />in tce ladcte.* .ray, at dis*.a^ces not exceeding tvrenty Ye et apart, <br />' but t:^.ey are not conplete. <br />T%e re is only one exit tc the mint, through the lain shaft. <br />It is readily accessible to emplo:-e es. <br />