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Powoll, Mr. E. H,, Jr. 



Tlw Institute of Marine Science of 



the University of Texas 

 Port Aransas, Texas 



Pratt, Dr. David M. 



Narragansett Marino Laboratory- 

 Kingston, Rhode Island 



Pratt, Dr. Ivan 



Oregon Institute of Marino Biol. 

 Charleston, Oregon 

 or Oregon State College 

 Corvallis, Oregon 



Pritchard, Dr. Donald W. 



Chesapeake Bay Institute 

 The Johns Hopkins University 

 1315 St. Paul St., Baltimore M, 

 or RFD 2, Annapolis, Md. 



Prokop, Mr. Joseph 



Texas A & M Research Foundation 



Laboratory 

 Grand Isle, La. 



Rakestrow, Dr. Norris V/, 



Soripps Institution of Oceanogr, 

 La Jolla, Calif. 



Ray, Dr. Dixie Lee 



Univ. of V/ashington Oceanographic 



Laboratorie s 

 Friday Harbor & Seattle, V/ash, 

 or Dept. of Zoology 



Univ. of 'Jash., Seattle, Wash, 



Redfiold, Dr. Alfred C. 



Woods Hole' Oceanographic Inst. 

 Woods Hole, Mass. 



Roid, Dr. W. M. 



Marine Biological Laboratory 

 Woods Hole, Mass. 

 or Dept. of Biology, Monmouth Coll. 

 Monmouth, 111. 



Marino Biology 



Field Experiments on Oystor 

 Mortality. 



Marino Biology 



Productivity in Noritic Waters, 



Invertebrate Zoology 



Physical Oceanography; Administration 

 (Director) 



A Study of the Theoretical Dynamics 

 of Estuarino Waters » 



Bacteriologist 



Causes of Oyster Mortality. 



Chemical Oceanography 

 Marino Invertebrate Zoology 



Marine Physiology, Administration 



(Supervision of Biological Program 



Tidal Currents. 



Invertebrate Zoology 



