NATIONAL GEOGRAPHIC MAGAZINE 



NATIONAL GEOGRAPHIC MONOGRAPHS 



Ou the Physical Features of the Earth's Surfack. designed especially to supply to teacher and 

 students of geography fresh and interesting material with which to sni plement the regular text book. 



IJST OF MONOGRAPHS COMPRISING VOI.UMK I: 



Genkral Physiographic Processes 



General Physiographic Features \l.\V. Powell 



Physiographic Regions ok the United States ... I 

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

 Present and Extinct Lakf.s of Nevada .... prof. I. C. Russell 

 Appalachian Mountains— Nortiikkn Section - - - liailey Willis 

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

 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 



Price for one set of ten monographs, $1.50. Five sets to one address, $0.00. Single monographs, aOc. 



Remit with order 10 AMERICAN BOOK COMPANY, 



IMev^ York - Olriclr-ir-iatI . CHlcago 



Ripans Tabules assist digestion. 



Terrestrial Magnetism 



An International Quarterly Journal 



Edited by L. A. BAUER 

 With the Co=operation of Eminent Magneticians 



WITH the March, 1897. issue, this Journal, devoted exclusively to Terrestrial Magnetism and allied 

 s>ibjects. such as Harth Currents, Auroras, Atmospheric Electricity, etc., entered on its second 

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

 abundantly shown by the numbers thus far i.ssued, 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. 



Among the contributors of the main articles in the past have been Messrs. Barus, Biirgen, Chrcc, 

 Eschenhagen, Littlehales, Riicker, Schmidt, Schuster, and de Tillo. 



Future numbers will contain : 



"The Earth, a Great Magnet," 



By Dr. J. A. FI.KMING. 



"The Electrification of the Atmosphere," 



Hv PK01-. ai,I';.\ani)1':k mcadik. 



"The Height of the Aurora," 



By prdk. ci.kvklanu abbf;. 



"The Distribution of Magnetic Observatories," 



(Illustrated). 



By Prof. MAX ESCIIKNHACKN, 



etc., etc 



The size of the Journal is royal octavo, a volume embracing about i'-m pages. Donu-stii- subscription 

 price: Two dollars ; single n\imbers, fifty cents. I-'oreigu svibscripliini prici- : Nine shilling.*, nine 



marks, or eleven francs. Address : 



TERRESXRIAI- IV» AG M ETI SIVl. 



The University of Cincinnati, Cincinnati, OhI*. 



