CARE OF A MICROSCOPE. 



Besides acquiring the ability to properly use an 

 instrument with its accessories, it is important to know 

 how to keep it in the best working condition. It may 

 be said without reserve that an instrument properly 

 made at the outset and judiciously used should hardly 

 show any signs of wear either in appearance or in its 

 working parts, even after the most protracted use ; and 

 further than this, every good instrument should have a 

 provision for taking up lost motion, if there is a likeli- 

 hood that this may occur in any of the parts. 



Especial care should be given to the optical parts, 

 in fact such care that they will remain in as good con- 

 dition as when first received, after any amount of use. 

 Accidental injury may occur, but is quite unlikely if a 

 systematic manner of working is followed, if a special 

 receptacle for each part is provided. 



Do not allow any person except your teacher to 

 manipulate your microscope or accessories. One 

 person may be expert in the manipulation of one 

 instrument and still find it difficult to work with 

 another. The fine adjustment particularly causes the 



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