FALLOUT PROGRAM QUARTERLY SUMMARY REPORT

U. S. NAVAL RESEARCH LABORATORYWASHINGTON 25, D. C. IN REPLY REFER TO6llO-a85A:LBL:eb3 November I960Subj: Fission product radioactivity of the air along the 80thmeridian (vest) during September I960; NRL Problem A02-13,Project No. MR 571-003; interim report onFigure: (l),, Daily Record of Fission Product p-Activity Collectedby Air Filtration(2) Radioactivity Profile for - September 19601. Radioactivity measurements of air-filter samples collected atvarious sites along the 80th meridian (vest) during the month ofSeptember 1960 are presented in Figure* (l). The radioactivity profile for September I960 is shovn in Figure (2). All radioactivity.concentrations are given in disintegrations per minute per cubic.meter of air at the collecting site.2. These measurements are being carried out as part of the U. S.Naval Research Laboratory program of atmospheric radioactivitystudies, Partial financial support is provided by the Divisionof Biology and'Medicine, U. S. Atomic Energy Commission.L. B. LOCKHART, JR.- 123 -III IIIIIIIIIIIIIII