o- a CUMULATIVE me $r?°/mi? A Lo 8 detardeweh B Ly, 2 a I 4 FMANMJJAS OND JF MAMJ JAS ON DN FMAM S JASON D'S FMAM J DY AS ON D 1954 1955 1956 1957 Fig. 1—Sr"* in New York City fallout. (High-walled stainless-steel pot collections.) 307 { * ae 4 | E aS 4 & | E. > = | s 23 | zy wy , F a atwallL dul A Mog ioss illadlide IL baalwlol wt d J a 5 oe N DB 1956 g : gz Sz 2) saatnee Lil ul. aaLel bo a 4 wood J A $7 o Nn D + F i9s7 Fig. 2—Sr’’ in Pittsburgh fallout. (Galvanized tub collections.) mM A 1958 mM J