140 IMBEDDING METHODS. 



mass has hardened, cut out a block containing the object 

 (this is of course applicable to other masses, such as celloidin) . 

 If paraffin be used, you may, instead of cutting out a block, 

 turn out the whole mass of paraffin by simply warming rapidly 

 the bottom of the glass. To facilitate the removal of the 

 mass, some persons lubricate the watch-glass before pouring 

 in the mass. To do this, a drop of glycerin should be 

 smeared over it and wiped off with a cloth until hardly a 

 trace of it remains. 



As regards the merits of the watch-glass process, I wish to 

 say that, as regards small objects at all events, I consider it 

 the very best process of any. 



