216 CEMENTS AND VAUNISEES. 



so in a bottle. When required for use mix a little of the 

 powder with gold-size to the consistency of paint, taking care 

 that no grit gets into it. 



430 a. Apathy's Cement for Glycerin Mounts (Zeit. f. wiss. 

 Mik., vi, 2, 1889, p. 171). -Equal parts of hard (60 C. melt- 

 ing point) paraffin and Canada balsam. Heat together in a 

 porcelain capsule until the mass takes on a golden tint and no 

 longer emits vapours of turpentine. On cooling this forms a 

 hard mass, which is used by warming and applying with a 

 glass rod or brass spatula. One application is enough. The 

 cement does not run in and never cracks. 



