PART I. 



HISTORY OF THE INVENTION AND IMPROVE- 

 MENTS OF THE MICROSCOPE. 



CHAPTER I. 



HISTORY OF THE INVENTION AND IMPROVEMENTS MADE IN THH 

 MICROSCOPE 



PAGE 



1 



CHAPTER II. 



FORMATION OP IMAGES BY THE ORGAN OF VISION THEORY OF 

 MICROSCOPICAL VISION, CHROMATIC AND SPHERICAL ABERRA- 

 TION OF LENSES MECHANICAL AND OPTICAL PRINCIPLES 

 INVOLVED IN THE CONSTRUCTION OF THE MICROSCOPE LENSES 

 MODE OF ESTIMATING THEIR PC WER ACHROMATIC LENSES 



MAGNIFYING POWER WOLLASTON's DOUBLET CODDINGTON*S 

 LENS SIMPLE AKD COMPOUND MICROSCOPES ROSS'S, POWELL 

 AND LEALAND'S, BECK'S, BAKER'S, PILLISCHER'S, LADD'S, 

 MURRAY'S, COLLINS'S, BROWNING'S, WATSON'S, SWIFT'S, HOW'S 



MECHANICAL AND SWING STAGE EYE-PIECESOBJECTIVES 

 MODE OF CORRECTING APERTURE OF IMMERSION, ETC. 

 MICROMETERS POLARISED LIGHT CAMERA LUCIDA BINO- 

 CULAR PHOTOGRAPHIC-DRAWING MICROSPECTROSCOPY . 



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