18 ANlSrUAL REPORT SMITHSONIAJST INSTITUTION, 1950 



tion comprising about 250,000 specimens from the Pennsylvanian of 

 Jack County, Tex., and the Cretaceous in the vicinity of Fort Worth, 

 Tex. Field work financed by the same fund resulted in the collection 

 of about 15,000 Paleozoic invertebrates by Dr. G. A. Cooper and 

 W. T, Allen in the Midwest, 500 Ordovician fossils by Dr. Cooper in 

 New York and Pennsylvania, and approximately 3,000 Lower Cre- 

 taceous fossils by Dr. A. R. Loebhch, Jr., and W. T. Allen in southern 

 Oklahoma and northern Texas. 



An excellent series of fossil mammals from the Paleocene of the 

 San Juan Basin, New Mexico, and the lower Eocene of western Wyo- 

 ming, including the condylarth Meniscotherium and the earliest titano- 

 there, Lambdotherium, were obtained by Dr. C. Lewis Gazin. Skeletal 

 remains of the giant ground sloth Megatherium and associated ele- 

 ments of the Pleistocene fauna were excavated by Dr. Gazin in 

 Herrera Province, western Panama. Dr. David H. Dunkle assembled 

 an unusual collection of Jurassic fossil fishes in the Pinar del Rio region 

 of western Cuba. Skulls of two distinct types of mosasaurs, collected 

 by Dr. T. E. White in the Cretaceous of Texas, were transferred by 

 the Smithsonian River Basin Surveys. 



Engineering and industries. — The Dan River Mills, Inc., presented 

 exhibition units illustrating the operation of a textile-finishing mill, 

 the development of a fabric design, and the production of a wrinkle- 

 shed finish. A hydraulic duplex pump, the first pumping engine of 

 the Washington (D. C.) aqueduct system, was transferred by the 

 District of Columbia through the Board of Commissioners. 



Two prints by Stanley William Hayter, one titled "Cronos," an 

 engraving and soft-ground etching, and the other titled "Palimpsest," 

 a soft-ground etching printed in three colors, as well as a lift-ground 

 aquatint named "La Faute," by Jacques Villan, were purchased for 

 graphic arts under the Dahlgreen fund. Fifty-one examples of the 

 work of the photographer Victor Prevost, who pioneered in the use 

 of waxed-paper negatives in the United States, were presented by 

 Melville Rosch. A Renfax synchronizer, early sound equipment used 

 prior to the invention of sound on film, was received from Ralph S. 

 Koser. A graphic portrayal of the development and use of sutures 

 in early times is shown in the exhibit "Sutures in Ancient Surgery" 

 donated by Davis & Geek, Inc. 



History. — A silver-filigree basket reputed to have belonged to 

 Napoleon and received as a bequest from Miss Bessie J. Kibbey is 

 worthy of notice. 



Two outstanding ship models, one of them a small-scale reproduction 

 of the U. S. S. Yorktown (CV-5) with a squadron of planes on the 

 flight deck, and the other a remarkably fine scale model of the U. S. S. 

 Washington (later Seattle) , were transferred by the Department of the 



