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Bh^ied hats of steel for cross-Uta 1S2 J96. Barrow drill 1S3 197. Drill moanted on stretcher bar 1S4 ;;l-: , Google LIST OF ILLUSTRAIIONS. irii 198. CUmu driU 185 ^Z^BDaaeyeiue, or boring ram of Dubois uid Francois . 1S6 aoi.
Full text of A text-book of ore and stone mining .. : Consulting inventory

Bh^ied hats of steel for cross-Uta 1S2 J96. Barrow drill 1S3 197. Drill moanted on stretcher bar 1S4 ;;l-: , Google LIST OF ILLUSTRAIIONS. irii 198. CUmu driU 185 ^Z^BDaaeyeiue, or boring ram of Dubois uid Francois . 1S6 aoi.