INTRODUCTORY 15 



better than glycerine jelly. As a preparation, the material should lie 

 for some time in Hantsch's fluid/ opportunity being given for evapo- 

 ration of the alcohol and water. When the material shows the 

 proper clearness and fulness, it may be mounted in jelly in the usual 

 way. Kaiser's formula gives beautiful results. After mounting, the 

 preparation should be sealed with some good cement, as Hollis's 

 glue. 



1^ Hantsch's Fluid: — 



Alcohol 90% three parts 



Water two parts 



Glycerine one part 



