RECEN T P UBLICA TIONS 5 8 x 



-Dawson, George M. Economic Minerals of Canada. Paris International 



Exhibition of 1900. Reprinted by Direction of Canadian Commission 



for the Exhibition, 1900. 

 -Dubuque County, Geology of. By Samuel Calvin and H. F. Bain. From 



Iowa Geological Survey, Vol. X, Annual Report, 1899, pp. 385-651. 

 -Economic Minerals of Canada, Descriptive Catalogue of a Collection of. 



Paris International Exhibition, 1900. 

 -Hadley Laboratory Bulletin of the University of New Mexico. Vol. II, 



Part I, 1900. 

 -Heilprin, Angelo. The Nicaragua Canal in its Geographical and Geo- 

 logical Relations. A Question as to the Permanency of the Proposed 



Canal. From the Bulletin of the Geogr. Soc. of Philadelphia, March 



1900. 

 -Heilprin, Angelo. The Shrinkage of Lake Nicaragua. A Question of 



Permanency of the Proposed Nicaragua Canal. July 1900. 

 -Jemsen, Adolf Severin. Om Levninger af Grundtvandsdyr paa store 



Havdyb mellem Jan Mayen og Island. (Ssertryk af Vidensk. Meddel. 



fra dem naturalist. Foren i. Kbhvn. 1900.) 

 -Jentzsch, Alfred. Der tiefere Untergrund Konigsbergs mit Beziehung 



auf die Wasserversorgung der Stadt. Aus. dem Jahrbuch der konigl. 



preuss. geologischen Landesanstalt fiir 1899. Berlin, 1900. 

 -Kansas, Mineral Resources of. 1899. Gold and Silver; Lead and Zinc; 



Coal ; Oil and Gas ; Gypsum : Building and other Stone ; Clay Products ; 



Hydraulic Cement ; Salt, 

 -Kansas, Bulletin of the University of. Vol. IX, No. 1, January 1900. 

 -Keyes, Charles R. Correlative Relations of Certain Subdivisions of the 



Coal Measures of Kansas. From the American Geologist, Vol. XXV, 



June 1900. 

 -Keyes, Charles R. Origin and Classification of Ore-Deposits. A Paper 



presented to the American Institute of Mining Engineers at its Wash- 

 ington Meeting, February 1900. 

 -The Geological Society of America, Bulletins of : 



Cambro-Silurian Limonite Ores of Pennsylvania. By T. C. Hopkins. 

 Vol. II, pp. 475-502, pi. 1. 



Some Coast Migrations, Santa Lucia Range, California. By Bailey 

 Willis. Vol. II, pp. 417-432, pis. 25-29. 



Vertebrate Footprints on Carboniferous Shales of Plainville, Mass., and, 



Glacial Origin of Older Pleistocene in Gay Head Cliffs, with Note on 

 Fossil Horse of that Section. By J. B. Woodworth. Vol. II, pp. 449- 

 460, pis. 40-42. 



