42 



STUDENTS HISTOLOGY 



edge of the section to a sheet of blotting-paper or filter- paper, to 

 remove as much as possible of the first fluid and prevent its dilut- 

 ing the second. 



Place a clean slide on the table before you, and, with the section- 

 lifter used like a spoon, dip up one of the sections from the clove 

 oil. By inclining the lifter, the section may be made to float to 



FIG. 21. METHOD OF LABELING A MOUNTED SPECIMEN. 



the center of the slide. A small sable brush is often convenient 

 for coaxing the section off the lifter. 



If it were our present object to simply examine the section, we 

 could drop a thin cover -glass on the specimen, and it would be 

 ready for study. Such an object would afford every requirement 

 for present observation, but would not be permanent. The oil of 

 cloves would evaporate after a few days, and the section be ruined. 

 We proceed to make a permanent mounting of our object. 



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

 removed, 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 care- 

 fully, taking fresh paper until the oil will no longer drain from the 



FIG. 22. MODE OF HANDLING THE COVER-GLASS IN MOUNTING 

 TISSUES FREEBORN. 



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

 a little of the xylol balsam (vide formulae) from the bottle, and 

 allow a drop of this balsam to fall upon the section. 



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

 the drop of balsam. This operation is seen in Fig. 22. The point 



