CONTENTS. 



PART I. 



CHAPTER I. 



THE MICEOSCOPE-STAND. 



PAGE 



On choosing a microscope -stand Designation of the parts of a 

 microscope Different forms of feet compared The stage Sub- 

 stage and underfitting Fine adjustment to sub-stage Coarse 

 and fine adjustments The limb Lengths and diameters of 

 body tubes The Eackwork draw-tube Tailpiece and mirrors 

 blique illumination Testing a microscope Binocular micro- 

 scopes High-power prisms Dissecting microscopes - - 16-37 



CHAPTER II. 



OPTICAL CONSTRUCTION. 



Magnifying power, how produced Objectives, apochromatic and 

 achromatic compared Angular and numerical apertures Im- 

 mersion lenses Abbe apertometer Aperture and power 

 Corrections for thickness of cover-glass Test objects Huy- 

 ghenian eyepieces Kelner eyepieces Projection eyepieces 

 Binocular eyepieces Illuminating apparatus The Abbe illumi- 

 nator and Abbe achromatic condenser Webster condenser 

 Swift's condenser Powell and Lealand's apochromatic con- 

 denserHow to work with the condenser How to produce a 

 dark background Spot lens Paraboloid Polariscope 

 Darker's selenites - Mica selenite stage Stand condenser 

 Nelson's aplanatic bull's eye The microscope lamp Nose- 

 piece Drawing apparatus Dr. Beale's neutral tint reflector 

 The Abbe camera lucida The measurement of objects by 

 mechanical stage By camera lucida and stage micrometer 



