viii PREFACE 



to be drawn from bacteriological examinations, and how far 

 they may be used as a basis of administrative action. 



Figures I and 16 and figures 8, 9, 10, n and 13 are taken 

 from my books The Bacteriological Examination of Water 

 Supplies and Milk and the Public Health respectively, and 1 am 

 greatly indebted to Mr H. K. Lewis and Messrs Macmillan 

 and Co. for their permission to use these illustrations. 



I have also to thank Messrs W. B. Saunders and Co. for 

 figure 3 (from Eyre's Bacteriological Technique), Messrs Long- 

 mans, Green and Co. for figure 12 (from Curtis's Essentials of 

 Practical Bacteriology), Messrs Baird and Tatlock for figures 

 5 and 15, and Messrs A. Gallenkamp and Co. for figure 7. 



WILLIAM G. SAVAGE. 



WESTON-SUP.ER-MARE. 

 February 1914. 



