Publications of the United States National Museum 



The scholarl) and scientific publications of the United States National Museum 

 include two series. Proceedings of the United States National Museum and United States 

 National Museum Bulletin. 



In these series the Museum publishes original articles and monographs dealing 

 with the collections and work of its constituent Museums — the Museum of Natural 

 History and the Museum of History and Technology — setting forth newly acquired 

 facts in the fields of Anthropology, Biology, History, Geology, and Technology. 

 Copies of each publication are distributed to libraries, to cultural and technical 

 organizations, and to specialists and others interested in the different subjects. 



The Proceedings, begun in 1878, are intended for the publication, in separate 

 form, of shorter papers from the Museum of Natural History. These are gathered 

 in volumes, octavo in size, with the publication date of each paper recorded in the 

 table of contents of the volume. 



In the Bulletin series, the first of which was issued in 1875, appear lunger, sepa- 

 rate publications consisting of monographs (occasionally in several parts) and vol- 

 umes in which are collected works on related subjects. Bulletins are either octavo 

 or quarto in size, depending on the needs of the presentation. Since 1902 papers 

 relating to the botanical collections of the Museum of Natural Histor\ have been 

 published in the Bulletin series under the sub-series Contributions from Ike United States 

 National Herbarium . Since 1959, in Bulletins titled "Contributions from the Museum 

 of History and Technology." have been gathered shorter papers relating to the 

 collections and research of that Museum. 



This work, brought to completion while the author was curator of engineering 

 in the Museum of History and Technology, forms number 238 of the Bulletin series. 



Frank A. Tayli ir 



Director, United Slides National Museum 



United States Government Printing Office, Washington, 1965 



For sale by the Superintendent of Documents, U.S. Government Printing Office 

 Washington, D.C., 20|02 • Price $2.50 (cloth) 



