XU INTRODUCTORY EDITORIAL NOTE 



preparing the indices, Dr. John Forney, Dr. Howard Hill, Dr. Norman 

 T. Mattox, Dr. Sydney Rittenberg, Mr. Arthur Wells, and Dr. L. 

 Zechmeister for checking some of the scientific details and nomenclature, 

 and Dr. George R. Cowgill for preparing the biography. 



Los Angeles, September, 1957 vStanley R. Townsend 



— fo)' the Editorial Committee 



