64 BACTERIOLOGY 



hardens it in alcohol, and cuts it into pieces which can 

 then be strained like sections of tissue, and thus rendered 

 permanent. 



To preserve small portions from agar plates, Giinther 

 lays them in a drop of glycerine placed on a slide, deposits 

 thereon a second drop, and finally the cover-glass. The 

 superfluous glycerine having been absorbed out the prepara- 

 tion is closed with cement. 



