348 The Smithsonian Institution 



and colleagues in ' Geology of the Quicksilver Deposits of the 

 Pacific Slope.' 



" 6. Pigeon Point collections. These comprise four hun- 

 dred specimens illustrating various contact phenomena as 

 occurring at Pigeon Point, on the north shore of Lake 

 Superior, and as described by Professor W. S. Bailey in a 

 bulletin 1 of the United States Geological Survey. 



" 7. Menominee Valley and Marquette River collections. 

 These comprise two hundred and fifty-four specimens illus- 

 trative of the dynamic metamorphism of eruptive rocks as 

 described by Professor George H. Williams. 2 



" 8. The Eureka (Nevada) collection, comprising some 

 five hundred and six specimens, rocks and ores, as studied 

 and described by Arnold, Hague, 3 Whitman Cross, and J. S. 

 Curtis. 4 



"9. The Cripple Creek (Colorado) collections. These 

 comprise some eight hundred specimens of rocks and ores. 

 The material studied by Whitman Cross and R. A. F. Pen- 

 rose and described in their report on the ' Geology and 

 Mining Industry of the Cripple Creek District.' 6 



" 10. The Silver Cliff collections, comprising three hundred 

 specimens of rocks and ores. The collection upon which is 

 based the report by Whitman Cross and R. A. F. Penrose. 



"n. The Tenth Census collection of Building and Orna- 

 mental Stone comprises some three thousand specimens, 

 mainly in the form of four-inch cubes, and two thousand thin 

 sections. 6 These formed the basis of the results given in ' The 

 Collection of Building and Ornamental Stones ; ja Handbook 

 and Catalogue/ 7 



l"The Empire and Sedimentary Rocks on * Curtis, Joseph Story. " Silver-lead De- 

 Pigeon Point, Minnesota, and their Contact posits of Eureka, Nevada, 1884." Monograph 

 Phenomena." 1893. Bulletin, No. 109. vil of the United States Geological Survey. 



2 "The Greenstone Schist Areas of the Me- 5 Sixteenth Annual Report of the United 

 nominee and Marquette Regions of Michi- States Geological Survey, Part II, 1894-95. 

 gan." 1890. Bulletin No. 62 of the United 6 Merrill, George P. Special Reports on 

 States Geological Survey. Petroleum, Coke, and Building Stones, Tenth 



3 Hague, Arnold. " Geology of the Eureka Census of the United States, 1880, Vol- 

 District, Nevada, with Atlas." 1892. Mono- ume x. 



graph xx of the United States Geological 7 Report United States National Museum, 

 Survey. 1886, page 277. 



