44 STUDENTS HISTOLOGY 



eye -piece, however, appears in the field. These lenses are readily 

 cleaned by dusting and wiping with the linen, after having breathed 

 on the surface. Never wipe a lens when dusting with a cam el' s- 

 hair brush will answer the purpose. 



The microscope should either be covered with a shade or cloth, 

 or put away in its case when not in use. The delicate mechanism 

 of the fine adjustment becomes worn and shaky if not kept free 

 from dirt. 



