APPENDIX. 401 



Turpentine is used as a clearing agent before mounting in 

 balsam specimens previously dehydrated with absolute alcohol ; 

 for this purpose it may be either used alone or in conjunction with 

 carbolic acid. 



Wax Mixture, for making joints in apparatus air-tight, may be 

 made as follows : Melt together 30 parts of beeswax, and 40 of 

 vaseline ; add to the mixture 15 parts of powdered resin, and stir. 

 The hardness of the mixture may be modified by varying the pro- 

 portions of beeswax and vaseline. 



Xylol is used as a solvent for Canada balsam, and as an inter- 

 mediary between absolute alcohol and balsam in the mounting of 

 balsam preparations. 



P, B, 26 



