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226. Mesaba Electric Railway trestle bridge, Chisholm, Minnesota

227. Mesabi Mountain Mine, Virginia, Minnesota

228. Miner beside drilling rig, Biwabik, Minnesota

229. Miners and surveyor beside steam shovel, northern Minnesota

230. Miners breaking boulders, northern Minnesota

231. Miners drilling holes for explosives, Hibbing, Minnesota

232. Miners drilling holes for explosives, Hibbing, Minnesota

233. Miners sitting in company movie theater, Eveleth, Minnesota

234. Miners square set room, northern Minnesota

235. Miners watching a safety film, Leonidas, Minnesota

236. Miners wearing respiratory equipment, Eveleth, Minnesota

237. Miners with boulders, Hibbing, Minnesota

238. Mine View, Virginia, Minnesota

239. Mine with Drake & Stratton Works, Biwabik, Minnesota

240. Mining equipment, Biwabik, Minnesota

241. Mining facility and equipment, Biwabik, Minnesota

242. Mining facility, Hibbing, Minnesota

243. Mining facility in winter, Hibbing, Minnesota

244. Mining laborers beside train, Hibbing, Minnesota

245. Mining laborers, Hibbing, Minnesota

246. Mining laborers, Hibbing, Minnesota

247. Mining laborers, Hibbing, Minnesota

248. Mining laborers, Hibbing, Minnesota

249. Mining locomotive and shovel, northern Minnesota

250. Mining operations at the Hibbing North 40, Hibbing, Minnesota