TRANSFERRING SECTIONS TO THE SLIDE. 



33 



would evaporate after a few days and the section be ruined. We pro- 

 ceed to make a permanent mounting of our object. 



The clove oil, surrounding the section on the slide, is first to be re- 

 moved; and it can easily be done by means of blotting-paper. With 

 a narrow slip of thin filter paper wipe up the oil, exercising care not 

 to touch the section or it will become torn. Proceed carefully, 

 taking fresh paper until the oil will no longer drain from the section 



FIG. 18 METHOD OF LABELLING A MOUNTED SPECIMEN. 



when the slide is held vertically. With a glass rod remove a little of 

 the dammar solution (vide formulae) from the bottle and allow a 

 drop of this varnish to fall upon the section. 



Pick up a clean cover-glass with a needle, and place it on the drop 

 of dammar. This operation is seen in Fig. 18. The point of the 

 needle may be placed beneath the cover-glass, the tip of the forefinger 



FIG. 19. MODE OF HANDLING THE COVER-GLASS IN MOUNTING TISSUES. 



pressing lightly over it, and you will be enabled to carry the thin 

 glass wherever desired. 



As the cover settles down the air is pressed out, until finally the 

 section appears imbedded in the varnish the latter filling the space 

 between the cover and the slide. 



The object is "mounted." You \\WQ2o permanent specimen. The 

 slide must be kept flat, as the dammar is soft. After some weeks, 

 3 



