viii PREFACE TO THE FIRST EDITION 



With the exception of Section XVII "Outlines 

 for the Study of Pathogenic Bacteria" introduced 

 with the idea of completing the volume from the point 

 of view of the medical and dental student, the work 

 has been arranged to allow of its use as a laboratory 

 guide by the technical student generally, whether of 

 brewing, dairying, or agriculture. 



So alive am I to its many inperfections that it 

 appears almost superfluous to state that the book is 

 in no sense intended as a rival to the many and ex- 

 cellent manuals of bacteriology at present in use, 

 but aims only at supplementing the usually scanty 

 details of technique, and at instructing the student 

 how to fit up and adapt apparatus for his daily work, 

 and how to carry out thoroughly and systematically 

 the various bacterioscopical analyses that are daily 

 demanded of the bacteriologist by the hygienist. 



Finally, it is with much pleasure that I acknowledge 

 the valuable assistance received from my late assistant, 

 Mr. J. B. Gall, A. I. C., in the preparation of the sec- 

 tion dealing with the chemical products of bacterial 

 life, and which has been based upon the work of 

 Lehmann. JOHN W. H. EYRE. 



GUY'S HOSPITAL, S. E. 



