. Transactions. 5 6 0 0720 7 8 9 10 Carboniz ing pot tip ped over. 1,900° F. 1 2 3 4 5 . 6

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. Transactions. 5 6 0 0720 7 8 9 10 Carboniz ing pot tip ped over. 1,900° F. 1 2 3 4 5 . 6 7 8 9 10 Eepeated Use at 1,750°. 1st 102d 10 • 3d 10 4th 10 COMMERCIAL CARBONIZING-MATERIALS. 415. I ME IN HOURS TIME IN HOURS

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries