Editorial Board: 



M. N. Hill 



Department of Geodesy and Geophysics 

 Madingley Rise, Cambridge, England 



Edward D. Goldberg 



University of California 

 La Jolla, California 



C. O'D. ISELIN 



Woods Hole Oceanographic Institution 

 Woods Hole, Massachusetts 



W. H. MUNK 



Institute of Geophysics and Planetary Physics 

 University of California 

 La Jolla, California 



