56 



preparation may then be placed upon the turn-table and a ring of 

 shellac cement put round the edge while revolving the turn-table. 



163. Sealing glycerin- jelly mounts. Allow the glycerin- 

 jelly to harden for 12 hours or longer. With a knife scrape away 

 the superfluous jelly and then carefully wipe around the coyer-glass 

 with a cloth moistened with water. Place the slide on a turn-table, 

 carefully center the cover-glass, and with a brush seal the edge of 

 the cover by a ring of shellac while revolving the turn-table. A 

 second coating may be given subsequently if needed, after the first 

 coat has dried. 



164. Sealing balsam mounts. This is necessary only with 

 special preparations, and should in any case be done only after the 

 preparations have dried out for several weeks. With a knife scrape 

 off all superfluous balsam from around the cover-glass and wipe it 

 carefully with a cloth moistened with alcohol or benzin (or xylene). 

 Seal as with glycerin- jelly mounts. 



LABELING MICROSCOPIC SLIDES. 



165. Every permanent microscopic preparation should be 

 carefully and neatly labeled in ink, the label being placed upon the 

 right hand end of the slide. The label should furnish at least the 

 following information: 



EXAMPLE. 



(1) The number of the prepara- 

 tion, the thickness of the 

 cover-glass and of the sec- 

 tion. 



(2) The name, kind, and source 

 of the preparation. 



(3) The fixer and the stain. 



(4) The date of the specimen. 



No. 



Ileum of Cat. 

 Transection. 



Z.*H.&E. 



November, 1898. 



C. 15 



S. 



In the case of specimens with which it is advantageous to have 

 more information at hand a second label may be placed upon the 

 other end of the slide, and it may bear the following information: 



*It is convenient to adopt a standard system of abbreviations, thus: Z. = 

 Zenker's fluid; He. = Kelly's fluid; M. = mercuric chlorid, etc. ; H. = Hema- 

 toxylin; E. = eosin, etc. 



