NATIONAL GEOGRAPHIC MAGAZINE 



NATIONAL GEOGRAPHIC MONOGRAPHS 



On the Physical Features of the Earth's Surface, designed especially to supply to teachers and 

 students of geography fresh and interesting material with which to supplement the regular text-book. 



LIST OF MONOGRAPHS COMPRISING VOLUME I : 



General Physiographic Processes -v 



General Physiographic Features - >J. W. Powell 



Physiographic Regions of the United States - -J 



Beaches and Tidal Marshes of the Atlantic Coast Prot. N. S. Shaler 

 Present and Extinct Lakes of Nevada - Prof. I. C. Russell 



Appalachian Mountains — Northern Section - - - Bailey Willis 

 Appalachian Mountains— Southern Section - - - C. Willard Hayes 

 Mt. Shasta— A Typical Extinct Volcano - - - - J. S. Diller 



The New England Plateau Prof. W. M. Davis 



Niagara Falls and Its History G. K. Gilbert 



Single monographs, 30c. Complete set, bound in cloth, $2.50. 



Remit with order to AMERICAN BOOK COMPANY, 



New York - Cincinnati . Chicago 



Ripans Tabules assist digestion. 



Terrestrial Magnetism 



AND 



Atmospheric Electricity 



An International Quarterly Journal 



Conducted by L. A. BAUER and THOMAS FRENCH, Jr., 

 With the Cooperation of Eminent Magneticians and Electricians. 



WITH the March, 1899, issue, this Journal, devoted exclusively to Terrestrial Magnetism, Atmos- 

 pheric Electricity, and allied subjects, such as Karth Currents, Auroras, etc., entered on its fourth 

 volume. The hearty co-operation extended by the workers in this promising field of investigation, as 

 abundantly shown by the numbers thus far issued, has made this Journal the international organ for 

 making known the latest achievements. The magnetic needle has become such a promising instrument 

 of research, not only in terrestrial, but in cosmical physics, that this Journal appeals to a large class of 

 investigators. The geographer, the geologist, the astronomer, the meteorologist — all are interested in 

 the development of the subject of terrestrial magnetism. It should therefore receive their support. 



A mong the contributors of the main articles in the past have been Messrs. Barus, Borgen, Chree, Com- 

 mander Davis, Eschenhagen, Hellmann, Littlehales, McAdie, Ri'icker. Schmidt, Schuster, de Tillo, von 

 Bezold, Mascart, and Abbe-. 



Future numbers will contain contributions by Mascart, Ri'icker, Elster and Geitel, Eschenhagen, 

 Hellmann. Ilavlord, I.ittlehales, Schmidt, and others. 



Special features in future numbers will be full abstracts and reviews of recent publications prepared 

 ' >\ competent reviewers and t he series of fine halftone portraits of eminent magneticians. 



The size of the Journal is royal octavo, a volume embracing about 256 pages. Domestic subscription 

 price: Two dollars and fifty cents. Foreign subscription price: Two dollars and seventy-five cents. 



Address : 



TERRESTRIAL MAGNETISM, 



The University of Cincinnati, Cincinnati, Ohi«. 



