IMBEDDING 



75 



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 Grundzuge, Lee and Mayer, 4th ed., p. 77. 



GiESBRECHT now makes trays of photographic fdms, which, 

 being transparent, facilitate orientation under the dissecting 

 microscope. 



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 



a: 



D 



a \ 



Fig. 1. 



Fig. 2, 



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

 with fluid masses, such as celloidin, tliQ 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. 



Leuckhart'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 together on a plate of glass which has been wetted with 

 glycerin and gently warmed. The area of the box will vary 

 according to the position given to the pieces, but the height can 

 be varied only by using different sets of pieces. Two sets will 



