PAKT I 



HISTORY OF THE INVENTION AND IMPROVEMENTS 

 OF THE MICROSCOPE. 



CHAPTER I. 



PAGE 

 HISTORY OF THE INVENTION AND IMPROVEMENTS OP THE 



MICROSCOPE 1 



CHAPTER II. 



MECHANICAL AND OPTICAL PRINCIPLES INVOLVED IN THE 

 CONSTRUCTION OP THE MICROSCOPE LENSES MODE OP 

 ESTIMATING THEIR POWER MICROMETERS POLARISED 

 LIGHT CAMERA LUCIDA BINOCULAR INSTRUMENT 

 PHOTOGRAPHIC-DRAWING M1CROSPECTROSCOPY ACHRO- 

 MATIC LENSES MAGNIFYING POWER WOLLASTON'fl 

 DOUBLET CODDINGTON'S LENR 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 



