6 PREFACE. 



attempt is made to supply the fullest details to the student 

 in order to insure satisfactory results. A complete index 

 will serve to render the text easily accessible. 



It is hardly necessary to state that the various journals 

 and the standard works on bacteriology have been freely 

 drawn upon in the preparation and revision of these pages. 

 It has been deemed desirable to introduce .illustrations 

 especially of such apparatus as is actually employed* 

 Thanks are due to the Bausch & Lomb Optical Co., of 

 Rochester, N. Y. , also to Eimer & Amend, and Stransky & 

 Co., of New York, for kindly supplying- several of the cuts. 



F. G. NOVY. 



ANN ARBOR. MICH., April 15, 1899. 



