6 REPORT OF IsTATIONAL MUSEUM, 1925 



and Entomology of the Department of Agriculture, and from tlie 

 Bureau of Fisheries of the Department of Commerce. Important 

 additions were also received as the results of collections! made by 

 members of our own staff. The Frances Lea Chamberlain Fund 

 enabled the curator of mollusks to purchase, some important 

 material. 



A notable acquisition to the geological collections was a large ball 

 of flawless rock crystal of rare value and interest 12% inches in 

 diameter, weighing 107 pounds, which was loaned by the importers, 

 Fukushima Co. (Inc.), through the interest of Worcester R. Warner, 

 of Tarrytown, N. Y. Through the continued interest and activities 

 of Victor C. Heikes and Frank L. Hess, of the United States Geo- 

 logical Survey, many unusual specimens of ores and minerals, a 

 number of which make excellent exhibition pieces, were added to the 

 collections by mining companies and private individuals. Several 

 rare minerals new to the collections were acquired during the year 

 among which may be mentioned a crystal of the new mineral 

 afwillite, discovered by the donor, Alpheus F. Williams, general 

 manager of the De Beers Consolidated Mines, Kimberley, South 

 Africa, and a part of the type of a new species — Chalcoalumite — 

 from Arizona secured through the exchange account with Harvard 

 University. The Frances Lea Chamberlain Fund permitted the pur- 

 chase of several desirable additions to the collection of gem min- 

 erals, and the Roebling Fund, provided by Col. W. A. Roebling, 

 enabled the museum to acquire several specimens of ores needed to 

 fill out the series. 



Other valuable and interesting specimens were received from 

 private individuals or firms. 



The results of Secretary Walcott's field work for the seasons 1921 

 to 1924, inclusive, which were deposited in the milSeum, and speci- 

 mens secured by members of the staff added important material to 

 the collections in invertebrate paleontology. A large series of slabs 

 containing tracks of extinct animals collected by C. W. Gilmore, 

 under the auspices of the National Park Service on the Hermit Trail 

 in Grand Canyon National Park, are an unusually interesting addi- 

 tion to the fossil vertebrate collections, which also received impor- 

 tant additions in bones of Pleistocene mammals from Florida, 

 donated by C. P. Singleton, or collected by Dr. J. W. Gidley. 

 Exchanges with other institutions also resulted in materially in- 

 creasing the series of fossil animals. 



The exhibits in automotive transportation received a number of 

 additions, important ones being a full size, electrically operated 

 automobile engine with portions of the outer casing cut away to 

 reveal the operation of the moving parts, contributed by the Buda 



