REPORT OF THE SECRETARY 23 
Schaus, of the Dognin collection of lepidoptera, which adds about 
82,000 specimens, including 3,000 types, to the collection. The divi- 
sion of marine invertebrates received large additions through the 
collections of Dr. W. L. Schmitt in South America, and also benefited 
through the transfer from the Bureau of Fisheries of further ma- 
terial taken on the Albatross expedition of 1911 to Lower California, 
which, included many new crustaceans as well as birds and fishes. 
The division of birds was presented, through Dr. W. L. Abbott, with 
a valuable collection of birds made in Siam and the Mentawi Islands 
west of Sumatra by C. Boden Kloss, and through Mr. B. H. Swales 
and Dr. Casey A. Wood with 65 bird skins of genera and forms not 
previously represented in the collections. 
In the department of geology, the accessions have included very 
choice and much-needed materials. The outstanding contribution 
to the division of geology was a collection of approximately 5,000 
specimens of ores of rarer metals, assembled by Mr. Frank L. Hess 
and received by transfer from the United States Geological Survey. 
The late Col. W. A. Roebling continued his generous contributions 
to the mineral collections, and other important additions were pre- 
sented by the United States Mint at Philadelphia, Mr. Jack Hyland, 
and the Government of British Guiana through Sir John Harrison. 
Of greatest interest for exhibition purposes was a large group of 
fluorite crystals presented by the Benson Fluorspar Co., of Cave-in- 
Rock, Ill., and thought to be the most unusual yet brought to public 
attention in America. The division of stratigraphic paleontology 
was enriched through the field explorations of its staff, which added 
invertebrate fossils from England, Canada, and Europe, as well as 
the United States. In continuation of his work of last year, Mr. 
C. W. Gilmore added a new series of shale and sandstone slabs 
containing the tracks of extinct animals to the collections of verte- 
brate fossils. Fossil mammal material of unusual value was collected 
in Florida by Dr. J. W. Gidley. 
The accessions in the department of arts and industries showed an 
increase over last year. In the section of mineral and mechanical 
technology, the outstanding accession was the airplane Chicago, the 
flagplane of the world flight. of 1924, which was transferred to the 
Museum by the War Department. The textile collections were en- 
riched by the addition of many new fabrics. Several models were 
installed illustrating the production of certain industrial articles, 
such as methyl alcohol, coke, casein, and condensed milk. Examples 
of etching, wood-engraving, lithograph, and other forms of graphic 
expression have been received by the division of graphic arts. The 
section of photography has received a valuable set of machines and 
material illustrative of the growth of the motion-picture industry. 
