. Transactions. Fig. 21.—Corner of Pig Shown ix Fig. 22.—Whiie Ikon of .! PerFig. 18. Etched. Magnified 100 Cent, of Carbon. Etched. :Mag- Diameters. nified lUO Fig. 23. — White Irox of PerCent, of Carbon. Etched. Mag-nified 100 Diameters. i. M:^ Ki^

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries