iv PREFACE 



of friends, and very specially from Dr. R. M. Buchanan, 

 Bacteriologist to the Corporation of Glasgow, and Dr. J. 

 Hume Patterson, Bacteriologist to the County Council of 

 Lanarkshire. To Dr. John A. Wilson, Assistant Bacteri- 

 ologist, Glasgow, I owe a careful revision of the chapter 

 on Special Bacteriological Examinations, including the 

 Table on pp. 3545, and much helpful criticism. To Dr. 

 Archibald MacMillan I am indebted for criticism of some 

 parts of the Chemical portion of the book, as a result of 

 which certain changes have been made. 



DAVID McKAIL. 

 Glasgow, 1912. 



