viii PREFACE 



Fouler ton of the Middlesex Hospital, and Dr Harold Spitta of St 

 George's Hospital, for the use of some excellent photographs. My 

 colleague, Mr Harold Swithinbank, has kindly allowed me to use 

 three coloured plates of "acid-fast" cultures from our book on the 

 Bacteriology of Milk, and he has also supplied me with several original 

 plates. To each of these gentlemen I am glad to have the oppor- 

 tunity of expressing my sincere thanks. G. N. 



LONDON, August 1904. 



