1 04 RECENT P UBLICA TIONS 



— -Scientific Roll and Magazine of Systematized Notes, Conducted by Alex- 

 ander Ramsay. Climate: Baric Condition. Nos. 9, 10, 11 and 12. 

 London, 1898. 



— Spencer, J. W. An Account of the Researches Relating to the Great 

 Lakes. From the American Geologist, Vol. XXI, February 1898. 

 Another Episode in the History of Niagara Falls. Read before the 

 American Association for the Advancement of Science, August 1898. 



— -Todd, J. E. Degradation of Loess. Reprinted from Report of Iowa 

 Academy of Sciences, 1897. Des Moines, 1898. 



Revision of the Moraines of Minnesota. Reprinted from the American 

 Journal of Science, Vol. VI, 1898. 



— Udden, J. A. The Mechanical Composition of Wind Deposits. 



Augustana Library Publications No. 1. Augustana College, Rock Island, 

 111., 1898. 



— United States Geological Survey : 



Bulletin No. 150. The Educational Series of Rock Specimens Collected 

 and Distributed by the U. S. Geological Survey. J. S. Diller. 

 Bulletin No. 152. Catalogue of the Cretaceous and Tertiary Plants of 

 North America. Knowlton. 



Bulletin No. 153. A Bibliographic Index of North American Carbon- 

 iferous Invertebrates. Weller. 



Bulletin No. 154. A Gazetteer of Kansas. Gannett. 

 Bulletin No. 155. Earthquakes in 1896-7. Perrine. 

 Bulletin No. 156. Bibliography and Index of North American Geology, 

 Paleontology, Petrology and Mineralogy for 1897. Weeks. 

 Geological Atlas of the United States, Truckee Folio, California. G. F. 

 Becker, H. W. Turner, and W. Lindgren. Washington, 1898. 



— Ward, Lester F. Descriptions of the Species of Cycadeoidea, or Fossil 

 Cycadean Trunks, thus far determined from the Lower Cretaceous Rim 

 of the Black Hills. From the Proc. of the U. S. National Museum, Vol. 

 XCI. Washington, 1898. 



