AN INTRODUCTION 



TO THE 



BACTERIOLOGICAL " 

 EXAMINATION OF WATER 



BY 



W. H. HO R ROCKS 



M.B., M B.Sc., LOND. 



ASSISTANT PROFESSOR OF MILITARY HYGIENE IN THE ARMY MEDICAL SCHOO1 



NETLEY; ASSISTANT EXAMINER IN HYGIENE UNDER THE BOARD OF 



EDUCATION, SOUTH KENSINGTON ; MAJOR, ROYAL ARMY 



MEDICAL CORPS 



LONDON 

 J. & A. CHURCHILL 



7 GREAT MARYBOROUGH STREET 

 1901 



