AN ACCOUNT OF THE U. S. NATIONAL MUSEUM. 315 



7. Menominee Valley and Marquette River collectioua. These comprise 254 speci- 

 mens illustrative of the d_ynamic nietaniorphism of eruptive rocks as described by 

 Prof. George H. Williams.' 



S. The Eureka (Nevada) collection, comprising some 506 specimens, rocks and ores, 

 as studied and described by Arnold Hague,* Whitman Cross, and J. S. Curtis.'^ 



9. The Cripple Creek (Colorado) collections. These comprise some 800 specimens 

 of rocks and ores. The material stiidied by Whitman Cross and R. A. F. Penrose 

 and described in their report on the ''Geology and Mining Industry of the Cripple 

 Creek District." * 



10. The Silver Cliff collections, comprising 300 specimens of rocks and ores. The 

 collection upon which is based the report by Whitman Cross and R. A. F. Penrose. 



11. The Tenth Census collection of building and ornamental stone comprises some 

 3,000 specimens, mainly in the form of 4-iuch cubes, and 2,000 thin sections.'" These 

 formed the basis of the results given in "The Collection of Building and Orna- 

 mental Stones; a Handbook and Catalogue.'"^ 



12. The Tenth Census collection of iron ores, comprising some 2,200 hand speci- 

 mens and 506 thin sections. This formed the basis of Prof. Raphael Pumpelley's 

 report.' 



13. The collection illustrating Kirkaldy's experimental inquiry into the mechanical 

 properties of Fagersta steel. 



14. Collections from the Archrean division of the United States Geological Survey 

 made in Vermont and Massachusetts, and forming the basis of the petrographic work 

 to be published in a forthcoming monograph.-^ 



Among the materials of greatest historical importance may be mentioned : 



(a) A mass of iron smelted by members of the Frobisher expedition during their 



stay at Frobisher Bay in 1578. 



(?>) A piece of metallic tin smelted by Dr. T. C. Jackson in 1840 from ore found at 



Jackson, Carroll County, N. H., and believed to have been the first tin smelted in 



America. 



(c) The first steel car axle made in America and bent cold 



(d) Copper medal. Struck from the first copper produced in Colorado in 1866. 



(e) Placer gold. First gold discovered in California, from tail race 200 yards below 

 the mill, panned by J. W. Marshall on the evenings of the 19th and 20th of January, 

 1848. Marshall's Claim, Sutter's Mill, Coloma, El Dorado County, Cal. 



(/) Sample of petroleum from the first flowing well in the United States. Drilled 

 in 1829 near Burkesville, Ky. 



Among the more striking collections of the exhibition series may be mentioned the 

 one illustrating limestone caverns and associated phenomena. This includes not 

 only a large and variegated series of stalagmitic and stalactitic minerals, but also 

 representative forms of animal life such as inhabit caverns. The collection as a 



' "The Greenstone Schist Areas of the Menominee and Marquette Regions of Michi- 

 gan." 1890. Bulletin No. 62 of the United States Geological Survey. 



'Hague, Arnold. "Geology of the Eureka District, Nevada, with Atlas," 1892. 

 Monograph xx of the United States Geological Survey. 



■'Curtis, Joseph Story. "Silver-lead Deposits of Eureka, Nevada, 1884." Mono- 

 graph VII of the United States Geological Survey. 



^ Sixteenth Annual Report of the United States Geological Survey, part ii, 1894-95. 



'Merrill, George P. "Special reports on Petroleum, Coke, and Building Stones, 

 Tenth Census of the United States," 1880, Vol. X. 



''Report United States National Museum, 1886, page 277. 



' Report on the Mining Industries of the United States, with special investigations 

 into the iron resources of the Republic, and into the Cretaceous coals of the North- 

 west. Vol. XV. 



" See also Thirteenth and Fourteenth Annual Reports of the United States Geo- 

 logical Sarveyj 



