REPORT OF THE SECRETARY: NATIONAL MUSEUM 117 



result of his field trip to Montana for the Museum this past sum- 

 mer, adds greatly to the value of the collection in definitely locating 

 all the specimens both geologically and geograpliically. Dr. R. S. 

 Lull, director of the Peabody Museum of Natural History, utihzed 

 the horned dinosaur collections in connection with his monographic 

 revision of the Ceratopsian dinosauria. Barnum Brown, of the 

 American Museum of Natural History, likewise made use of the col- 

 lections in connection with his study of the armored dinosauria. 



Assistance to Government bureaus and private individuals. — Mineral- 

 ogical material w^as furnished to members of the Geological Survey, 

 the Department of Agriculture, and the Geophysical Laboratory, and 

 Dr. Resser continued his services to the Geological Survey as 

 adviser on Cambrian questions. Requests from Prof. George M. 

 Hall, of the University of Tennessee, for identification of age and 

 species in Cambrian collections necessitated considerable study of the 

 Nohchucky fossils. Thereby, for the first time, definite information 

 was obtained regarding the faunal characteristics of this widespread 

 southern Appalachian formation. A large series of highly important 

 Cambrian fossils was obtained by the Princeton Summer School, at 

 Red Lodge, Mont., and forwarded to the Museum for preliminary 

 identification. 



DISTRIBUTION AND EXCHANGE OF SPECIMENS 



The follo\ving distribution of geological specimens was made: 

 Gifts, 3,456 specimens; exchanges, 2,278; loans for study, 1,767. As 

 transfers to other Government bureaus, 21 specimens were sent. 



NUMBER OF SPECIMENS UNDER DEPARTMENT 



The estimated total of specimens in the department is as follows: 



Mineralogy and petrology 140, 736 



Geology, systematic and applied 95, 493 



Stratigraphic paleontology 1, 864, 167 



Vertebrate paleontology 27, 322 



Total 2, 127,718 



