. Transactions. 3 •<* ^ S 7 S TIME IN HOURS TIME IN HOURS III i~rrT~ryLl-T—f^-h-t--^^-|—^. 3 ** S C 7 STIME IN HOURS s ^ ^ s e 7 sTIME IN HOURS 404 COMMERCIAL CAKBONIZING-MATERIALS. Table XXI.—Material 0. 1,600° F. ^ .s Ke Depth of Carbon. 1^ ^o Over Per Cent. Cent. to Per Cent. to Per Cent. Total. 1 Grams. Per , 1 nan Inches. 2 3 4 5

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. Transactions. 3 •<* ^ S 7 S TIME IN HOURS TIME IN HOURS III i~rrT~ryLl-T—f^-h-t--^^-|—^. 3 ** S C 7 STIME IN HOURS s ^ ^ s e 7 sTIME IN HOURS 404 COMMERCIAL CAKBONIZING-MATERIALS. Table XXI.—Material 0. 1,600° F. ^ .s Ke Depth of Carbon. 1^ ^o Over Per Cent. Cent. to Per Cent. to Per Cent. Total. 1 Grams. Per , 1 nan Inches. 2 3 4 5 6 7 8 9 1 ; 1,750° F. 10 ? 1 ,

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries