626 ACKNOWLEDGMENTS 



Meetings Service, Robert D. Hogg, Chief, Interpretation Section, 

 United Nations, and Miss Elise Salade, Administrative Officer, 

 UNESCO, for their invaluable assistance and friendly interest; to 

 the American Institute of Physics, American Museum of Natural 

 History, Columbia University, New York Zoological Society, 

 Woods Hole Oceanographic Institution, and others who cooperated 

 or contributed with social events; to the United States Military 

 Air Transport Service for substantial assistance with transporta- 

 tion; and to Rhodes \V. Fairbridge, Department of Geology, 

 Columbia University, for providing all projection equipment. To 

 all these, on behalf of the Congress, the American Association for 

 the Advancement of Science expresses its appreciation. 



Editorial Note. It is with heartfelt appreciation that I want to take 

 this opportunity to recognize the large portion of the editorial burden 

 assumed by Miss Ruth C. Christnian. Without her support and long 

 hours devoted to checking the manuscripts and the proofs and then 

 cross-checking again directly with the authors, this volume could never 

 have been completed in an orderly manner and with as little delay. This 

 has been especially difficult as individual authors quite literally were 

 scattered in all four corners of the globe. To Miss Christman goes the real 

 credit for this volume. 



Mary Sears 



30 March 1961 



