156 



THE ART OF MAKING MICROSCOPE SLIDES 



Pluteus larva 



encountered is in making sure that the 

 celloidin blocks and their contents adhere 

 firmly to the glass sHde. It will usually be 

 found that when the ribbon is flattened 

 on water there is a tendency for the cel- 

 loidin block to bow up, and it will inevi- 

 tably become detached in subsequent 

 staining operations. The writer has found, 

 however, that if a saturated solution of 

 ether in water, instead of pure water, is 

 used for flattening, and if each section is 



pressed firmly in place with wet filter 

 paper and a rubber roller as described in 

 Chapter 12, adhesion Avill be perfect. Any 

 standard adhesive may be used. The writ- 

 er's preference in this instance is for the 

 egg albumen of Mayer (Chapter 28, V 21.1 

 Mayer 1884). 



As the sections have already been 

 stained, it is only necessary to remove the 

 wax with xylene and to mount in whatever 

 resinous medium is selected. 



