ACKNOWLEDGMENTS 



Grateful acknowledgment is due the Yale University 

 Press for permission to use the quotations from Dr. 

 George Gaylord Simpson, pp. 15-17, 175; to the Illus- 

 trated London News for permission to reproduce Figure 

 11, and to many colleagues, particularly Mr. James W. 

 Atz, Dr. Frank A. Beach, Dr. C. M. Breder, Dr. 

 George L. Clarke, Mr. Christopher Coates, Dr. 

 George Gamow, Dr. Chester W. Hampel, Dr. Donal 

 Sheehan, Dr. George Gaylord Simpson, Mr. Peter 

 Smith, and Dr. S. Bernard Wortis for advice on tech- 

 nical matters. 



The writer is also indebted to Mr. Philip S. Miller, 

 Acting Chief of the Music Division of the New York 

 Public Library, for Sir James Paget's account of the 

 Mendelssohn presto; to Mr. Harold C. Schonberg, of 

 the Music Department of The New York Times, for call- 

 ing his attention to the Godowsky-Chopin 'Badinage*; 

 and to Mr. Abram Chasins, Mr. Harold Lawrence, 

 Mr. Sigmund Spaeth, Miss Rosalyn Tureck, and 

 Mrs. Nathaniel W. Leonard for numerous suggestions. 

 He is particularly grateful to Dr. David Saperton for 

 aid in the analysis of music presented here, and for mak- 

 ing available for counting his copies of Godowsky*s 

 music. 



Special acknowledgment must be paid to Miss Mary 

 LoRENC for her careful execution of the illustrations. 



