FOREWORD This volume contains daily reports written in the field by scientists from the University of Washington Laboratory of Radiation Biology during the 1964 expedition to Eniwetok, Bikini and Rongelap Atolls. The unedited reports contain information submitted each day by members of the party to Dr. Lauren R. Donaldson, Laboratory Director. Interpretations or comments are Dr. Donaldson's. The purpose of the daily reports was to create an on- the~spot record of observations and impressions. Expedition participants, whose work is represented in these reports, were as follows. Laboratory of Radiation Biology, University of Washington Lauren R. Donaldson -~ fish, radiation studies Arthur D. Welander - fish, " " Ralph F, Palumbo - plants, " " Kelshaw Bonham - invertebrates, " " Gary Lewis ~ oceanographer, Hill Williams - historian " " College of Forestry, University of Washington Stanley P. Gessel -soils and soil-plant relationships " “ " " " Richard Billings Office of News Services, University of Washington James 0. Sneddon - photographer