46 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1&20. 



scientific value. Of these accessions, 111 were gifts, 32 transfers, 25 

 exchanges, 2 were collections by members of the force, 1 received as a 

 deposit, and but 9 acquired by purchase. Among those of greatest 

 importance were gifts comprising ores of the rare metals, particu- 

 larly tungsten and molybdenum, secured chiefly through Mr. Frank 

 L. Hess, of the United States Geological Survey, an honorary cus- 

 todian in the Museum. The donors included Mr. C. W. Purington, 

 Vladivostok, Siberia ; Mr. J. G. Hibbs, Denver, Colorado ; the Home- 

 stake Mining Co., Lead, South Dakota; the R. & S. Molybdenum Co., 

 Questa, New Mexico ; and the Molybdenum Mines Co., Denver. Other 

 important additions were made by Dr. J. Morgan Clements, of New 

 York, traveling in China in the interest of the Federal Trade Com- 

 mission, and Mr. M. L. Patterson, manager of the Thabawleik Mines, 

 Mergui, Burma. 



An excellent series of crystallized native copper and silver minerals 

 from the Lake Superior region was acquired by purchase and gift, 

 and a large slab of native copper, simulating in outline the continent 

 of South' America, was received from the Bolivian delegates to the 

 Second Pan American Financial Conference. 



The meteorite collection was enriched by examples of the following 

 stones: Colby, Wisconsin, 3,642 grams; Bjurbole, Finland, 2,500 

 grams ; Washington County, Kansas, 2,003 grams ; Kesen, Japan, 1,397 

 grams; and Appley Bridge, 598 grams. In addition there was ac- 

 quired 3,320 grams of an iron from Yenberrie, Australia. 



Valuable collections in the form of minerals and invertebrate fos- 

 sils, comprising many thousands of specimens, were received from 

 the United States Geological Survey, as was also a large series of 

 igneous rocks from the Yellowstone National Park, described by Dr. 

 J. P. Iddings in volume 32 of its monographs. 



Large collections from the West Indies, particularly from the 

 Dominican Republic, have been added to the series of invertebrate 

 fossils, which have been further augumented by some 10,000 specimens 

 from the Upper Cambrian of Wisconsin. 



To the exhibition series have been added a large and unique speci- 

 men of trilobite, the largest American form in existence, which was 

 found during excavations in connection with the conservancy dam 

 at Dayton, Ohio; a mounted skeleton of the large, extinct mammal, 

 Brontotlierium hatcheri; the sea-living lizard, Tylosaurus proriger; 

 and a diminutive camel Stenomylus hitchcocki. The study collec- 

 tions in vertebrate paleontology were augumented by a considerable 

 number of type specimens, deposited by the Maryland Geological 

 Survey, which, though fragmentary, are of primary interest. Of 

 equal importance are gifts of Pleistocene bones and teeth from a 

 cave near Bulverde, Texas, donated by Dr. O. P. Hay, and similar 

 material from Cavetown, Maryland, gift of Phillips Academy, Ando- 

 ver, Massachusetts. 



