506 



CATALOGUE OF EXHIBITS. 



77 

 78 



79 

 80 

 81 



82 



Flame of the Bessemer Process. 



Flame of the Bessemer Process. 



Flame of the Bessemer Process. 



Flame of the Bessemer Process. 



Wellman 50-ton tipping open-hearth furnace. 



Herreshoff Copper Smelting Cupola Furnace. 



H 



MINERALOGY. 



In Charge of L. McI. Luquer. 



I . Minerals from the Collections of the American Museum of 

 Natural History. Exhibited by L. P. Gratacap. 



1. Native Gold, in Limonite, San Juan, Colorado. 



2. Tellurium (group of crystals), Boulder Co., Colorado. 



3. Coloradoite, Boulder Co., Colorado. 



4. Lionite, Boulder Co., Colorado. 



5. Nagyagite, Boulder Co., Colorado. 



6. Leadhillite, Cerussite, concentric upon a nucleus of 



Galenite, Lehmi Co., Idaho. (The above minerals 

 are part of the Theodore Berdell gift to the American 

 Museum of Natural History.) 



7. Bixbyite, near Simpson, Utah. 



8. Limonite (altered Pyrite), Xaaga, near ruins of Mitla, 



600 feet elevation, Oaxaca, Mexico. 



9. Martite, Twin Peaks, Utah. 



10. Wood Opal, Douglass Co., Washington. 



11. Willemite (red), Frankhn, N. J. 



1 2. Willemite (enclosing needles of Franklinite ?), Frank- 



lin, N. J. 



13. Epidote, Ouray Co., Cal. 



14. Melanotekite, New Mexico. 



15. Calamine (yellow). Lone Elm near Joplin, Mo, 



16. Spodumene, Black Hills, Wyoming. 



