CONTENTS 



Page 



Introduction 1 



Materials and methods 2 



Tests of electrical fields 5 



Exploratory tests 5 



Spacing and patterns of electrodes (tests 1, 



2, and 3, table 3) 5 



Distance between rows of electrodes 



(tests 3 and 4, table 3) 5 



Electrical conditions (tests 4, 5, and 6, 



table 3) 5 



Systematic tests & 



Conclusions 7 



Acknowledgments 8 



Literature cited 8 



1X1 



