[Proceedings United States National Mnseom, 1884. Appendix.] 

 SMITHSONIAN INSTITUTION. 



XTNITKID STA.TE1S N J^TION J^TL, 3VI TJ S E TJ Ml. 



No. 25. 



PRELIMINARY PLAN FOR A COLLECTION OP THE BUILDING AND 

 ORNAMENTAL STONES AND ROCKS OF THE UNITED STATES, 

 TO BE EXHIBITED AT THE WORD'S INDUSTRIAL AND COTTON 

 CENTENNIAL EXPOSITION OF 1884-1885, AT NEW^ ORLEANS. 



Br CEOROE P. ITIEBRIIili, 



Curator of lithology and physical geology. 



1. Building and oknamental stones. 



(a.) A collection showing all grades and varieties of building and 

 ornamental stones quarried in the United States; this to be 

 accompanied by a hand-book containing a brief description of 

 each variety of stone and its mineral composition ; also tables 

 of statistics relative to the amount and value of the quarry 

 products and capital invested. 



(6.) A series of maps showing by means of variously-colored dots 

 the locations of all the quarries in the United States, and the 

 kinds of stone there found. 



2. Illustrations of stone buildings. 



A series of photographs of stone buildings colored to represent the 

 natural color of the stone of which each is constructed. 



3. EOCK-FOKMING MINERALS. 



A collection of all the varieties of minerals usually constituting 

 rock masses, properly grouped and labeled, giving the name, 

 crystalline system, and chemical composition of each, together 

 with the names of the rock or rocks in which each occurs. 



4. EOCK COLLECTION. 



A collection of hand-specimens of rocks in sizes of about 3 inches 

 by 4 inches by 1 inch, comprising all the principal varieties 

 known to lithologists. 



[1] 573 



