CHAPTER VII. 



73 



finish it, turn the dogs' ears round against the ends of the box, turn 

 down outside the projecting flaps that remain, and pinch them down. 

 A well-made post-card tray will last through several imbeddings, 

 and will generally work better after having been used than when 



new. 



Another method of folding the paper (MAYER) is described in the 

 Grundzilge, LEE and MAYER, 4th ed., p. 77. 



GIESBRECHT now makes trays of photographic films, which, being 

 transparent, facilitate orientation under the dissecting microscope. 



A r 



FIG. 2. 



To make paper thimbles, take a good cork, twist a strip of paper 

 several times round it so as to make a projecting collar, and stick a 

 pin through the bottom of the paper into the cork. For work with 

 fluid masses, such as celloidin, the cork may be loaded at the bottom 

 by means of a nail or piece of lead, to prevent it from floating when 

 the whole is thrown into spirit or other liquor for hardening (Fig. 2). 

 Or you may use short lengths of solid lead rod instead of cork. 



LEUCKF ART'S Imbedding Boxes are made of two pieces of type- 

 metal (Fig. 3). Each of these pieces has the form of a carpenter's 

 " square " with the end of the shorter arm triangularly enlarged 

 outwards. The box is constructed by placing the two pieces to- 

 gether on a plate of glass which has been wetted with glycerine and 

 gently warmed. The area of the box will vary according to the 



