92 



CHAPTER VII 



Collar, and stick a pin through the bottom of the paper into 

 the cork. For work with fluid masses, such as celloidin, 



A' 



~ 



\ 



A 



._ 



B| 



FIG. 2. 



FIG. 1. 



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). 

 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 evidently 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 be sufficient 

 for most work ; one set of one centimetre in height, and one 

 of two centimetres, each being eight centimetres in length, 

 and three in breadth. To make the box paraffin -tight, so 

 that it will hold the melted paraffin long enough in the 

 liquid state to permit of the objects being carefully orientated 

 in it, MAYER (Mitth. Zool. Stat. Neapel,iv, 1883, p. 429) first 



