444 PARTICIPANTS 
STERNBERG, HircarD O’Rettty Professor of Geography, and Director, 
Centro de Pesquisas de Geografia do Brasil, Universidade do Brasil, 
Rio de Janeiro, Brazil 
Sunpstrom, R. W. District Engineer, Ground Water Branch, Geologi- 
cal Survey, U.S. Department of the Interior, Austin, Texas 
Swarprick, James A. Deputy Head, Division of Scientific Research, 
UNESCO, Paris, France 
Tuo, Hersert Chief Climatologist, Weather Bureau, U. S. Depart- 
ment of Commerce, Washington, D. C. 
TrxERoNT, JEAN Ingenieur en Chef des Travaux Publics, Tunis, 
Tunisia 
Uvarov, B. P. Director, Anti-Locust Research Centre, London, 
England 
VaLENTINE, K. A. Associate Animal Husbandman, Department of 
Animal Husbandry, New Mexico College of Agriculture and Me- 
chanic Arts, State College, New Mexico 
Watten, C. C. Assistant Director, Swedish Meteorological and Hy- 
drological Institute, Stockholm, Sweden 
Went, F. W. Professor of Plant Physiology, Earhart Plant Research 
Laboratory, Division of Biology, California Institute of Technology, 
Pasadena, California 
Watre, Girpert F. President of Haverford College, Haverford, Penn- 
sylvania 
Wiccins, Ira L. Professor of Biological Sciences and Director, Natu- 
ral History Museum, Stanford University, Stanford, California 
Witcox, L. V. Asistant Director, U. S. Salinity Laboratory, Agricul- 
tural Research Service, U. S. Department of Agriculture, River- 
side, California 
Workman, E. J. President and Director of Research and Development 
Division, New Mexico Institute of Mining and Technology, So- 
corro, New Mexico 
