PREFACE vii 



and later as a member of Professor E. F. Gale's unit in the 

 Department of Biochemistry at Cambridge. For the prepa- 

 ration of electron micrographs used in the lectures and this 

 book I am most grateful to Dr. J. A. Chapman of the Rheu- 

 matism Research Department, University of Manchester, 

 Professor A. L. Houwink of the Technical Physics Depart- 

 ment, Delft, Professor E. Kellenberger of the Laboratoire 

 de Biophysique, Geneva, Dr. V. Mohr of the Department of 

 Biochemistry, The Technical University of Norway, Profes- 

 sor R. G. E. Murray, Department of Bacteriology, London, 

 Ontario, Dr. D. H. Northcote, Department of Biochemistry, 

 Cambridge, and Professor R. C. Williams, University of 

 California, Berkeley. I should also like to thank Dr. M. 

 Ikawa and Professor E. E. Snell for their kind permission 

 to quote their results prior to publication. It is a great 

 pleasure to thank the members of the Institute of Micro- 

 biology at Rutgers for their hospitality during the presenta- 

 tion of these lectures. 



M. R. J. Salton 



Department of Bacteriology, 

 University of Manchester, England. 

 March 1961 



