PREFACE ix 



Another result worth mentioning here, however, is the canonical form 

 of linear noisy networks. This form summarizes in a clear, almost visual, 

 manner the connection between the internal noise of a network at any 

 particular frequency and its (resistive, positive, or negative) part. 



We are hopeful that this second work in the series of Technology Press 

 Research Monographs will meet the standards and aims envisioned by 

 Professor Gordon S. Brown, whose personal inspiration and energetic 

 support brought the present volume into existence. 



We wish to express our sincere thanks to Miss Joan Dordoni for the 

 careful preparation of the manuscript. We also acknowledge gratefully 

 the thorough and exacting editing work of Miss Constance D. Boyd. 



The support in part by the U. S. Army (Signal Corps), the U. S. Air 

 Force (Office of Scientific Research, Air Research and Development 

 Command), and the U. S. Navy (Office of Naval Research) is also 

 acknowledged with gratitude. 



Massachusetts Institute of Technology 

 Cambridge, Massachusetts 

 January, 1959 



