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No. 9. — Model of Chandler Iron Mine in Minnesota. 
No. 10. — A model of rail rolling mill. 
Nos. 11 and 12. — Models of annealing furnace and rolling 
mill for making structural iron, donated by Stumm & Co. 
Nos. 13 and 14. — Tool steel bars from the Avesta Steel 
Works, Sweden. 
No. 15.— Rims for locomotive wheels, and a solid steel shaft 
eight feet long, and examples of twisted tram-car axles and bars. 
Nos. 16 and 17. — Bars and twisted pieces of iron and 
steel from Avesta Steel Works, Sweden. 
No. 18. — Complete Reciprocating Rock Drill. 
No. 19. — Dumping ore car used in modern iron mines. 
No. 20. — Model of a Hot Air Blast furnace. 
