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 likelihood 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 

 condition as when first received. Accidental injury 

 may of course occur to them, but if a systematic man- 

 ner of working is followed and a special receptacle 

 for each part is provided, this may usually be avoided. 

 The following rules refer mainly to the instruments 

 manufactured by the Bausch & Lomb Optical Co., 

 but are applicable to instruments in general. 



