290 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1921. 



Quicksilver deposits, Nevada, Bull. 620-D, U. S. Geol. Survey. 



Rabbit Hole, Nev., Bull. 225, U. S. Geol. Survey. 



Ray and Miami copper districts, Arizona, Prof. Paper 115, U. S. Geol. Survey. 



Redding quadrangle, California, Folio 138, U. S. Geol. Survey. 



Rico quadrangle, Colorado. Folio 130, U. S. Geol. Survey. 



Rio Grande Region, New Mexico, Water Res. Paper, 188, U. S. Geol. Survey. 



Rochester mining district, Nevada, Bull. 580-M, U. S. Geol. Survey. 



Rockland quadrangle, Maine, Folio 158, U. S. Geol. Survey. 



Roseburg quadrangle, Oregon, Folio 49, U. S. Geol. Survey. 



Ruby Hill, Nev., Monograph 7, U. S. Geol. Survey. 



San Francisco and adjacent districts, Utah, Prof. Paper 80, U. S. Geol. Survey. 



San Luis Quadrangle, California, Folio 101, U. S. Geol. Survey. 



Santa Cruz Quadrangle, California, Folio 163, U. S. Geol. Survey. 



Santa Rita and Patagonia Mountains, Ariz., Bull. 582, U. S. Geol. Survey. 



Searles Lake, Calif., Bull. 580-L, U. S. Geol. Survey. 



Silver City, quadrangle, Idaho, Folio 104, U. S. Geol. Survey. 



Silver Cliff-Rosita, Colo., 17th Annual Report, U. S. Geol. Survey. 



Silver Peak, Nev., Prof. Paper 50, U. S. Geol. Survey. 



Silverton quadrangle, Colorado, Folio 120, U. S. Geol. Survey. 



Snake River Valley, Idaho. 



Snoqualmie quadrangle, Washington, Folio 139, U. S. Geol. Survey. 



Sonora quadrangle, Washington, Folio 41, U. S. Geol. Survey. 



South Mountain, Pa., Bull. 136, U. S. Geol. Survey. 



Southern Sierra Escarpment, Calif., Prof. Paper 110, U. S. Geol. Survey. 



Sugar Loaf district, Colorado. 



Tacoma quadrangle, Washington, Folio 54, U. S. Geol. Survey. 



Taylorsville Region, California, Bull. 353, U. S. Geol. Survey. 



Telluride quadrangle, Colorado, Folio 57, U. S. Geol. Survey. 



Ten Mile district, Colo., Folio 48, U. S. Geol. Survey. 



Tewan Mountains, N. Mex., Bull. 66, U. S. Geol. Survey. 



Three Forks quadrangle, Montana, Folio 24, U. S. Geol. Survey. 



Tintic district, Utah, Folio 65 and Prof. Paper 107, U. S. Geol. Survey. 



Tonopah, Nev., Prof. Paper 104, U. S. Geol. Survey. 



Uvalde quadrangle, Texas, Folio 64, U. S. Geol. Survey. 



Virgilina district, Virginia, Proc. U. S. Nat. Mus., vol. 40. 



Washoe district, Nevada, Monograph 3, U. S. Geol. Survey. 



White Mesa district, Arizona, Bull. 540, U. S. Geol. Survey. 



Wichita Mountains, Okla. 



Winters (Hess) district. California, Bull. 594, U. S. Geol. Survey. 



Yellowstone National Park, Wyo., Monograph 32, U. S. Geol. Survey. 



Terington district, Nevada, Prof. Paper 114, U. S. Geol. Survey. 



Yuma County, Ariz., Bull. 451, U. S. Geol. Survey. 



In addition to the above there is a large collection of rocks and 

 ores from world-wide sources which are classified by kinds, rather 

 than locality. 



DIVISION OF MINERALOGY. 



EAST WING, SECOND FLOOR, SOUTH SIDE. 



Entering the hall from the rotunda on the west, the visitor finds 

 upon his immediate right an " Introductory Series " consisting of 

 minerals selected to show the physical properties of color, hardness, 





