EDITORIAL COMMENT AND ACKNOWLEDGEMENTS 



Abstracts oi the papers appear as furnished by the 

 authors. Because ot the freshness and unrestrained charac- 

 ter of the discussion, it was important that it be retained in 

 as near its original form as possible. Therefore a minimum 

 number of changes were made by the editorial comimittee. 

 Technical changes, where they were necessary, were made 

 by the discussants themselves. 



We have enjoyed wholehearted cooperation by the 

 authors in submitting their abstracts and by the discussants 

 in making technical corrections in their comments. For 

 .this we wish to express our appreciation. The assistance 

 of Alfred E. Smalley in transcribing the tape recording is 

 also gratefully acknowledged. Finally we are grateful to 

 Mrs. Lois G. Scott for her painstaking work in typing the 

 final copy. 



The editorial task was shared by the entire commit- 

 tee, but final responsibility for any errors rests with the 

 chairman. 



Robert A. Ragotzkie, Chairmian 



Lawrence R. Pomeroy 



John M. Teal 



Donald C. Scott 



IV 



