ILLUSTRATIONS, 



PLATE. 



Outline .Map showing the position of the ancient mine-pits of Point Keweenaw, Michigan, by 

 Charles Whittlesey. (Frontispiece.) 



WOOD-CUTS. 



Figure 1. Waterbury Mine — artificial cavern . 



Figure 2. Wooden Shovel — Waterbury Mine . 



Figure 3. Section on the Copper Falls Vein . 



Figure 4. Stone Hammer or Maul, with one groove, and broken by use Copper Falls Mine 



Figure 5. Copper Spear -head — Copper Falls Mine 



Figure 0. Central Mine. Section of the vein and old pit, East and west 



Figure 7. Broken Maul, without groove— Central Mine 



Figure 8. Ancient Pits in the Boulder Drift or Gravel — Qnincy Location 



Figure 9. Minnesota Mine. Section across the Vein, looking from the easterly quarter 



Figure 10. Stone Maul, with double grooves — Minnesota Mine 



Figure 11. Copper Chisel, full size — Minnesota Mine . 



Figure 12. Spear-head, half size— Ontonagon. From drawings of John F. Mullowney, Esq 



Surveyor .... 



Figure 13. Copper Gad, full size — Minnesota Mine 



Figure 14. Chisel, half size — Ontonagon 



Figure 15. Rude Copper Knife, full size — Carp River . 



Figure 1G. Pointed Tool with a Socket, full size — Carp River 



Figure 17. Copper Instrument, full size — Fort Wilkins 



Figure 18. Copper Hook, full size— Sanlt St. Mary's . 



Figure 19. Outline of a Copper Tool, full size— Garden River, 



Figure 20. Copper Spear-head, full size, downward view — Oak 



eonsin .... 



Figure 21. Copper Knife, full size 



Canada 



Orchard, Oconto County, Wis 



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