CELLS. 



6. Epithelium. Scrape the inside of your check with the buck of your nail and make 

 a fresh preparation of 1 he material obtained. Make drawings under the high power showing 

 the epithelial cells with nuclei. 



7. Blood. Prick your finger and make a fresh preparation of blood in the following 

 manner : 



Put a drop of 0-9 per cent NaCl solution on the slide and then a drop of blood next to 

 it. With the aid of a pin make the two drops run together and then put on a cover-glass. 

 Draw : circular red cells ; irregularly shaped white cells. 



