EXAMINATION OF 

 COMMON OBJECTS. 



2. Paper. Tear off a small piece of paper and mount it for microscopic examination 

 by placing it on a slide, adding a drop of water and covering it with a cover-glass. This 

 is called a " fresh preparation." Examine it under both low and high powers and draw 

 what you see. The black circles which may be present in this and the following prepa- 

 rations are air-bubbles. 



3. Cotton. Make a similar fresh preparation of cotton-wool. Draw what you see 

 under both powers. 



