®fe NATIONAL 



GEOGRAPHIC 

 MAGAZINE 



23 



Vol. XVII 



APRIL, 1906 

 CONTENTS 



No. 4 



OUR PLANT IMMIGRANTS 



(Illustrated) 



An Account of Some of the Results of the Work of the 



Office of Seed and Plant Introduction of the 



Department of Agriculture and of Some 



of the Problems in Process 



of Solution 



By David Fairchild 



Agricultural Explorer, in Charge of Foreign Explorations 



THE POLAR AIRSHIP 



(Illustrated) 



By Walter Wellman 



Published by the National Geographic Society 



Hubbard Memorial Hall 



Washington, D. C. 



