. PAET I. 



HISTORY OF THE INVENTION AND IMPROVEMENTS 

 OF THE MICROSCOPE. 



CHAPTER I. 



PAOK 



HISTORY OF THE INTENTION AND IMPROVEMENTS OP THE 



MICROSCOPE 1 



CHAPTER II. 



mechanical and optical principles involved in the 

 construction of the microscope — lenses — mode of 

 estimating their power — micrometers — polarised 

 light — camera lucida — binocular instrument — 

 photographic-drawing — m1crospectroscopy — achro- 

 matic* lenses — magnifying power — wollaston's 

 doublet — coddington's lens — simple and compound 

 microscopes — quekett's, ross's, powell and lea- 

 land's, baker's, pillischer's, ladds', Murray's, high- 

 ley's, COLLINS'S, AND OTHER MICROSCOPES 15 



