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Microscopical Essays. 



C H A R IV. 



'General Instructions for using the Microscope, 

 and preparing, the objects. 



AS the advantages which are obtained from any inftrument 

 are confiderably increafed, if it be ufed by a perfon who is 

 mafter of it's properties, attentive to it's acquitments, and 

 habituated by practice to the minutiae of management, it is the 

 defign of this chapter to point out thofe circumftances which re- 

 quire moft the attention of the obferver, and to give fuch plain 

 directions, as may enable him to examine any object with eafe ; 

 to fhew how he may place it in the beft point of view, and, if 

 neceffary, prepare it for obfervation. 



A fmall degree of attention will render the obferver mafter of 

 every neceffary rule, and a little practice will make them familiar 

 and habitual : the pains he takes to acquire thefe habits will be 

 rewarded by an increafing attachment to his inflrument, and the 

 wonders it difplays. Let him only perfevere till he has over- 

 come that natural indolence which oppofes the advancement of 

 every kind of knowledge, and he will furely find himfelf moft 

 amply recompenfed, by the pleafure of a fcience that has the un- 

 limited treafures of infinite wisdom for the object of it's 

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