LIGHT (OPTICAL) MICROSCOPY 



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C. J. Koester 



Light (optical) microscopy 



COMPARISON MICROSCOPES. See ENGINEER- 

 ING MICROSCOPES, p. 438. 



DESIGN AND CONSTRUCTION OF THE 

 LIGHT MICROSCOPE 



Base and Illuminator. The traditional 

 horseshoe base with mirror has generally 



been supplanted by a base in the form of a 

 hollow casting enclosing some form of 

 built-in illuminator. Mirrors for use with ex- 

 ternal sources or natural lighting are avail- 

 able optionally, but the trend is toward the 

 convenience and ease of operation resulting 



434 



