XU PREFACE 



Diseases," Hewlett's "Bacteriology/' Klein's "Micro-organisms 

 and Disease," McFarland's "Text-book upon the Pathogenic 

 Bacteria," or Curtis's " Essentials of Practical . Bacteriology," 

 are all suitable for this purpose, and a perusal of any one of them 

 will be both pleasurable and profitable to every medical man. 



Several illustrations have been borrowed from sources mentioned 

 in the text, and for the loan of these the author wishes to express 

 his best thanks to the respective authors and publishers. His 

 best thanks are also due to Messrs. Baird and Tatlock, Swift and 

 Son, Zeiss, Leitz, Hawksley, and Hearson, for kindly providing 

 illustrations of apparatus made by them. 



