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Coal mining in Illinois . noth-ing better than a block room-and-pillar system and a typicalmine plan of this type is shown in fig. 17. These mines,however, are called panel mines and they
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The American fruit culturist. Fig. 607.—Black Walnut (Taylor;. Fig. 608.—Peanut-shapedBlack Walnut. tree from forty to sixty feet high. It has a more open spread-ing head than the hickory, and is more
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