Jan. 1935 Annual Report of the Director 199 



stalagmite formations from the Luray Cave, in Virginia. The 

 specimens were accompanied by six large colored transparencies 

 which adequately represent the peculiar and beautiful scenerj^ of 

 the caverns. 



The United States Potash Company, New York, selected from 

 its exhibit at A Century of Progress and presented to the Museum 

 two large blocks of the potash salts from its mine near Carlsbad, New 

 Mexico. This important newly found deposit which extends over 

 parts of Texas and New Mexico had hitherto been represented only 

 by a few small specimens. As the deposit, which resembles the 

 celebrated deposit at Stassfurt, Germany, is of a kind not hitherto 

 exploited in this country-, its adequate representation in the collec- 

 tions is important. The Missouri Commission to A Centurj^ of 

 Progress presented good examples of the curious blossom rock found 

 in Missouri, and some iron ores. 



The large collection of ores of the state of Washington presented 

 last year by the Northwest Mining Association, which was loaned 

 back to the association for exhibition during the second season of 

 A Century of Progress, was returned and is now included in the 

 economic collections. 



Many visitors to A Century of Progress brought material from 

 home to be identified, and they presented many of the specimens 

 which proved to be good museum material. Some visitors presented 

 specimens to improve the showing from their home towns, and 

 exchanges were arranged with other visitors. 



Mr. William J. Chalmers, of Chicago, presented fifteen specimens 

 of gold ore and nuggets which are of historical interest because they 

 were collected during the gold rush to California in 1849. Mr. 

 Franklin G. Mcintosh, of Beverly Hills, California, presented a 

 large, well-crystallized colemanite from Nevada and seven Cali- 

 fornia minerals. 



A large block of wood opal from a petrified forest in Oregon, the 

 gift of Messrs. Robert Sloane and A. R. Renner, of Klamath Falls, 

 Oregon, is a striking addition to the opal section of the mineral 

 collection. Although this specimen, which weighs fifty pounds, 

 lacks the fire of precious opal, the wide range of colors it displays 

 and its soft luster make it a most attractive product of the fossiliza- 

 tion of wood. Four wood opal specimens of a different kind, presented 

 by Mr. Thomas A. Carney, of Portland, Oregon, display some 

 features of unusual interest. Another example of fossil wood and 

 five fossils were presented by Mr. L. W. Buker, of Provo, South 



