TRANSLATOR'S PREFACE 



THE present is practically a new edition in English of 

 Professor Schenk's Gnuulris* der Baktcriologie, published 

 in Germany some months ago, the scope and intention of 

 which the Author has explained so fully in his preface that 

 it is unnecessary to touch upon them here. Numerous 

 additions, many of which have been furnished by Professor 

 Schenk, have been made both in the body of the text and 

 in notes. Those by the Translator are distinguished, 

 where of any importance, by square brackets when in 

 the text, as on p. 92, and in the case of foot-notes by 

 square brackets with the letters * Tn.' following, as on 

 p. 21. 



The Author originally intended to write an appendix, in 

 order to bring the English edition up to date, but this was 

 found unnecessary, owing to the short time since the ap- 

 pearance of the work in Germany, and the few additions 

 required for this purpose have been incorporated in the text. 

 It was, however, decided at the last moment, in view of the 

 attention lately attracted to those subjects, to furnish a 

 brief account of M. Haffkine's anti-cholera vaccination, 

 together with the results of recent research on the 



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