ABSTRACT Fallout samples collected at Operation REDWING were measured by a scintillation type gamma-ray spectrometer. Absolute photon intensities as a function of time are listed in tabular form for each detectable gamma line from each sample. Most samples represent known fallout collection areas so that dose rates in the vicinity of collection sites can be calculated therefrom. Cloud samples from Shots Zuni and Navaho show the presence of Na™.induced activity and possible mechanisms for its production are suggested. This report is one of a series of similar reports issued by the USNRDL Radiation Characteristics Section following major weapons test series: USNRDL-420, 31 August 1953; USNRDL-TR- 32, 26 January 1955; USNRDL-TR-106, 27 August 1956. ii ,