14 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1947 



ites not previously represented in the Museum were received during 

 the year. Forty-four mineral specimens were purchased through the 

 Canfield fund. 



Collecting trips by Dr. G. A. Cooper and Dr. A. R. Loeblich, Jr., 

 yielded over 36,000 Paleozoic fossils for the invertebrate collections. 

 Several gifts received were important in helping to fill the study series 

 in invertebrate paleontology and paleobotany. Among these were 85 

 Mississippian ammonoids from Arkansas, numerous Lower Permian 

 specimens from New Mexico, extensive collections of Middle Devonian 

 invertebrates, excellent Eocene echinoids from Florida, 120 blocks of 

 Cambrian and Ordovician limestone with choice silicified brachiopods 

 from the Arbuckle Mountains, 275 Tertiary fossils from Florida, ex- 

 tensive sets of Paleozoic and Cretaceous inverterbrates, including many 

 micro-organisms and bryozoans, 375 specimens of unusual Cambrian 

 and Lower Ordovician fossils from Quebec, 4,000 Upper Devonian 

 fossils from New Mexico, and 2,000 Paleozoic invertebrates from 

 Virginia, and a similar collection from Georgia. 



Resumption of field work following the war also brought increased 

 material to the division of vertebrate paleontology. Outstanding was 

 the discovery in one block in the Bridger Eocene beds of the skulls 

 and portions of the skeletons of two unusually large rodents of the 

 genus Paramys. Among other rarities in the season's finds were jaws 

 and skeletal parts of the artiodactyl Helohyus^ about five examples of 

 the minute insectivore N^yctitheriimi^ and remains of the marsupial 

 Peratheriwm. Other additions to the Bridger collections made by 

 Dr. C. L. Gazin were skulls of the large six-horned mammal Uinta- 

 therium, the titanothere Palaeosyo'ps^ and the rhinoceros Hyrachyus. 

 Among the materials transferred from the United States Geological 

 Survey was a nearly complete skull and jaws of a Triassic reptile, a 

 phytosaur, from the Petrified Forest of Arizona. 



Engineering and industries. — In the division of engineering an out- 

 standing accession was the motor tricycle designed and built at Pitts- 

 burgh in 1897 by Louis S. Clarke, automobile pioneer, and claimed 

 to be the first Autocar. Several ship models received enhanced the 

 watercraft collection. Two accessions in the field of microscopy are 

 of unusual interest : The curious ruling machine with which Charles 

 Fasoldt, in the mid-nineteenth century, produced the ruled slides and 

 gratings prized over all others by many well-known microscopists ; 

 and a group of microscopes and accessories collected by the late Dr. 

 Richard Halsted Ward, first president or the American Microscopical 

 Society, and his son, the late Dr. Henry Baldwin Ward, parasitologist. 



A historically important accession in the division of crafts and 

 industries was one of the two original rubber masticators developed 

 by Thomas Hancock in England prior to 1830. The machine was in 



