TARLE OF CONTENTS LIST OF FIGURES . 2 2s ew wo oe LIST OF TABIES. « « © 6 o © 8 © INTRODUCTION, ee @© @ @ e @ 8 € Precipitation. e @ @ @ @ 6 @ * &¢ @ @g@ &F & e a] SO WL wn eo@e.e ee e@e©& ee & © © @ @ @ © © * VII, Water Other than Precipitation VIII. sir Concentration, « « 2sees 15 15 18 18 20 33 26 29 0 2 ee oe 13 31 4 e@ VI. Soil 10 10 2o 36 5h ee Vv. # IV. Botanical. ... e TII,. Animal Products, e I. Human Bone... IZ. Animal Bone. «. DECEMBER 1, 1955 TO AUGUST 1, e CHICAGO SUNSHIN RESULTS POR PSRTIOD eo0e«© IV, Fresh Milk from Chicago Dairies: . .. e V. Sr?0 Content of Foreign Soils. . « « « « oe De Chicago Fallout History from Rain and Soil Data... III. Results for 1955 Chicago }ilkshed Samples. Ae 1955 Chicaro Milksned Soils «6... B, 1955 Chicago Milkshed Alfalfas. « « « eh C. Solubility of sr? Deposited in Rains oe ; && B, Test of Rain Collection Metnod. . *“ee*ee#%* Ir, Srv in Chicago Rains. .. A, Summary of Chicago Rain Data, 1953. through 1955 - @ I. Sr%O Surface Air Concentration Data. & DISCUSSION OF RESULTS . 2 «+. ee ee we wo NYGO 30