PREFACE 



THIS Manual of Bacteriological Technique and Special Bacteriology has 

 been written in pursuance of a plan first adopted by the writer while 

 working in the Hygienic Institute, Berlin, and is the result of consider- 

 able experience of the wants of students in Bacteriology, both here and 

 abroad. The technique and working methods have been carefully 

 selected, and from the mass of available material on this rapidly growing 

 branch of the subject, only those methods and material have been 

 chosen which possess distinctive benefits. The methods are all straight- 

 forward and practical, and when carefully performed give excellent 

 results. 



It was thought best to separate the Technique from the Bacteriology 

 of Special Diseases, which latter is included in the Special Bacteriology. 

 This has been made very inclusive, and it is thought that it is quite 

 sufficiently so, for any one not so specially equipped as to go to the 

 original papers and articles. Much that is of importance in the study of 

 the comparative diseases of animals and those transmissible to man has 

 been included, an inclusion very necessary in the light of the growing 

 importance of this to the practical hygienist. Again, to meet the needs 

 of Sanitarians an account has been given of the common bacteria found 

 in water, milk, air, soil, etc. It is generally agreed that a book of this 

 description is not a fitting place for original or controversial work, and 

 that the object to be attained is the presenting of a correct idea of the 

 relative conditions of the contemporary science consequently little is 

 alluded to of the above nature, and nothing speculative which could be 

 avoided without interfering with inevitable deductions from fundamental 

 experimental principles. 



I take the opportunity of expressing my thanks to Dr George 

 Nuttall of the Hygienic Institute, Berlin, for many valuable suggestions, 



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