PREFACE 



Thanks to the deft pens and rather widespread editorial experience of our con- 

 tributors, these Proceedings have required very little editing on my part. 



Discussions of the papers appear nearly as they were given orally, although 

 most contributors availed themselves of the opportunity to polish the actual stenographic 

 record. It is hoped that the resulting gain in clarity and brevity has offset any loss in 

 color and informality. 



My gratitude and admiration go out to Miss Ruth Benning, our steno-typist, 

 for her herculean efforts in recording the oral proceedings, and to Mrs. Jane Cochrane 

 and Mrs. Audrey Steinman for their aid in preparing the clean typescript. 



Finally, an apology is due those who may have been led by past performance 

 to expect an earlier publication date for these Proceedings. It is sincerely hoped that 

 this volume will have a lasting value which will compensate for its tardy appearance. 



F. S. Sherman 



