REPORT 01^ NATIONAL MUSEUM, 1&20. • 31 



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,G42 grams; Bjurbole, Finland, 2,500 

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

 1,397 grams; and Appley Bridge, 598 grams. In addition was ac- 

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



Valuable collections in the form of minerals and invertebrate 

 fossils, comprising many thousands of specimens, were received from 

 the U. S. Geological Surve}^, as was also a large series of igneous 

 rocks from the Yellowstone National Park, described by Dr. J. P. 

 Iddings in volume 32 of their monographs. 



Large collections from the West Indies, particularly from the 

 Dominican Republic, haA'e been added to the series of invertebrate 

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

 from the Upper Cambrian of W^isconsin. 



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, 

 Biontotherium hatcJieii; the sea-living lizard, Tylosauriis prork/er: 

 and a diminutive camel Stenomylus hitcJicocki. The studv collec- 

 tions in vertebrate paleontology were augmented by a considerable 

 num.ber of type specimens, deposited by the Maryland Geological 

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

 equal importance are gifts of Pleistocene Ix)nes and teeth from a cave 

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

 from Cavetown, Maryland, gift of Phillips Academy, Andover, 

 Massachusetts. 



Tile gem collection has been thoroughly overhauled, reweighed, 

 and recatalogued, and a handbook and catalogue of the same pre- 

 pared, the manuscript of which is noAV in the hands of the Govern- 

 ment Printer. 



The work of preparing 100 sets of 85 specimens each of ores and 

 minerals for distribution to schools, mentioned in the report of last 

 year, has been completed and the sets are now ready as occasion shall 

 demand. 



The collections under the supervision of the curator of textili^s, 

 which, besides textiles, embrace medicine, food, wood technology, 

 and miscellaneous animal and vegetable products, were increased by 

 many gifts and by transfer from other government bureaus amount- 

 ing to over 2,000 objects. The most important of these are as follows : 



