NA TIONAL GEOGRA PKIC MA GA ZINE 



NATIONAL GEOGRAPHIC MONOGRAPHS 



Ou the Physical Fkathres of the Earth's fti-RKACE. designed especially to supply to teachers and 

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



LIST OK MONOGRAPHS COMPRISING VOLUME I: 



General Physiographic Processes ^ 



General Physiographic Features J- W. Powell 



Physiographic Regions ok the United States ... I 

 Beaches and Tidal Marshes of the Atlantic Coast Proi. N. S. fthaler 

 Present and Extinct Lakes ok Nevada - - . . prof. I. C. Rus.sell 

 Appalachian Mountains— Northern Section - - - Hailey Willis 

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

 Mt. Shasta— a Typical Extinct Volcano - - - - J. S. Uiller 



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, $6.00. Single monographs, aOc. 



Remh with order /o AMERICAN BOOK COMPANY, 



Nev«/ "VorUc - Cincinnati . CHicago 



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 

 subjects, such as Earth Currents, .\uroras, .\tuiospheric Electricitv, etc., entered on its second 

 volume. The heartv co-operation extended bv the workers in this promising field ol investigation, as 

 abundantlv shown liv 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 phvsics, that this Journal appeals to a large clas.s of 

 investigators. The geographer, the .geolocfist. the astronomer, the meteorologist— all are ihtere.sted 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 Mcs.srs. Banis, Hnrgen. Chree, 

 F:schenhagen, I.ittlehales, Rucker. Schmidt, Schuster, and de Tillo. 



Fut\ire tnimbers will contain : 



"The Earth, a Great Magnet," 



liv I)K. J. A. I'Ll'.MING. 



"The Electrification of the Atmosphere," 



Hv I'KOK. ai.I';\ani)i-;r mcadie. 



"The Height of the Aurora," 



i!v pkoi ci,hvi;i.ani) abmi-:. 



"The Distribution of Magnetic Observatories," 



I Illustrated I. 



liv Prok, MA.\ ESCIII-;.V1IA('.KN, 



etc., etc. 



The size of the Journal is royal octavo, a vdlume einl>raciiig about i.«, pages. l)omestic siihscription 

 price: Two dollars ; single numbers, fifty cents, l-oiei.uu subscription price: Nine shilling.s. nine 



i:SXf=?IAI_ fS/lACSMEXIStVI. 



The University of Cincinnati, Cincinnati, Ohi«». 



marks, or eleven francs. ^»v.u.^.,., . _. ._^...^«... r.^^fvyi 



-rERRE:SXf=?IAI_ fS/1 ACSMEXIStVI 



