146 



PRACTICAL HISTOLOGY 



lies uppermost, whilst the razor is held in the way 

 shown in Fig. 24, and the wax-mass is evenly and 

 gradually shaved off layer by layer until the em- 

 bedded tissue conies into view. The pieces of wax- 

 Fig. 24. 



Process of cutting sections of the embedded tissue. 



w, cake of wax-mass, with the piece of tissue seen in it as a dark patch, com- 

 pletely inclosed and supported by the wax ; p, bibulous paper wrapped 

 round the wax-mass, except where this is being cut ; d, dish containing 

 spirit; c, glass cover with section lifter lying upon it. The flask on the 

 right of the figure serves to receive the spirit which has been used, for this 

 may be employed again and again if filtered back after use. 



mass which are removed in this way must not be 

 allowed to fall into the spirit, but are to be put on 

 one side, and the razor wiped clean. It is then again 

 dipped in the spirit, and a fresh layer of the cake 

 removed, including a moderately thin section of the 

 tissue. This is not to be kept, the only object in 

 making it having been to prepare a clean even sur- 

 face to cut from. The razor is again wiped clean 

 this must be done before each fresh section re- 

 wetted with spirit, and, starting at the edge of the 



