e e 1 e e e ° ® # @# e e . e @ @ «6 @ @ © € © © © e@e«¢e#e8 ee e s * e e e e s e od e 2 ® e e es e e e e e e e . ® Cloud Action Bused Upon Cloud Photography ° e e e e e e e e e e s e a e e e e e e * * a eo * Interval and Cumulative "Aetivities from Intermittent Fallout Collector Samples end Wind Vectors. . . Activity in the Base Surge . Fallout at Elmer. . . ° Activity . . . ° Beta Activity Concentrations . . Beta Energy Measurements . . . Gamma Energy Spectrum ,. . ° 3. 8. 1 Gamma Counting Equd pment and Technique 8 3.5.2 Procedure Used in Analysis of Curves RR RW @ @ * s s e e e a eo e . e e e . e e e Shot 6 Decay Exponent Variations ° e e # * e e ° e e s e e e * ° * * ° Shot 4 ° ° e e e * ° Ww a Wo Lo Shot 3 Activity . Ww Ww Shot 2 CF Shot e BR Re WLW B® One WD 3.3.1 @ e a e 8 e e@© ° oo @® e e ° @ J 8 * @ RESULTS General . . Beta Counting Equipment, “Techniques, "and Corrections Extrapolation of Beta Activities to Sarpling Time e 3 ® o Recovery and Shipment “oft Samples e ese ° 6 @¢ ® 8 08 * ° o e Operations Project Participation e e . e e ® e e e e e . ° e s a « . e ® ® e e e e e e a e e e ° * * e cf e o e s Mountings e ° . e . oe . e * * Timing ° 28 ee =. ° © e e e e e e e NNNNDYND oee ef & 6 “TAU WD .. . . The Intermittent Fallout Collector » 1 2 «3 #8 EXPERIMENTAL DESIGN Design Griteria eo CHAPTER 2 eo e . Objective 2. 6 Military Significance Background . . . « @ e . ee ee oT INTRODUCTION. © e CHAPTER 1 8 es ° eo oJ e e e e ° e * e e e e e e e ° e e cd ° e * ° ° @ e e . ° * ° ¢ & ° e a e » ° * e e e e ABSTRACT . FOREWORD . ACKNOWLEDGMENTS. € CONTENTS *