6 PEEFACE. 



attempt is made to supply the fullest details to the studen.^ 



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. 



