INTRODUCTION 



visions were adequate for a sojourn of at least three 



years. 



The American Geographical Society and the Uni- 

 versity of Illinois came to the help of the American 

 Museum in financing this undertaking, and the expedi- 

 tion sailed under the auspices of these three institutions. 



D. B. M. 



Boston, Massachusetts, Mayy 1918, 



