. Transactions. Fig. 20.—Zn, 85 ; Cu, 5 ; Sn, 10. X 45. Fig. 21.—Zn, 35 ; Sn, GO ; Cr, 5. X fi^P ^fe ^^^ ^^jQhML%^^4|N^^^J^^ Fig. 22.—Sn, 78 ; Sb, 19 ; Zn, 3. vx45. Fig. 23.—Zx, 85 ; Sb, 10 ; Cu, 5. x 45. Fig. 24.—Cu, 88; Sx, 10 ; Zx, 2. X 45. Fig. 25.—Cu, 62 ; Sn, 11; Pb, 27. X 65.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries