CONTENTS. 



PAKT I. 



INTRODUCTION - - - 1-5 



CHAPTER I. 



THE MICROSCOPE-STAND. 



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

 microscope Different forms of feet compared The stage 

 Sub-stage and under-fitting Coarse and fine adjustments 

 Two-speed fine adjustments The limb The body-tube. 

 The mechanical draw - tube Tailpiece and mirrors 

 Binocular microscopes Microscopes for dissecting Micro- 

 scopes for metallurgy Microscopes for travellers Micro- 

 scopes for petrology and for preparing and mounting The 

 selection of a microscope Testing a microscope - - 6-47 



CHAPTEE II. 



OPTICAL CONSTRUCTION. 



Optical definitions Magnifying power, how produced Objec- 

 tives, apochromatic and achromatic Immersion objectives 

 Angular and numerical apertures The apertometer 

 Correction for thickness of cover-glass The use of the correc- 

 tion collar Testing objectives The Abbe test-plate Choice 

 of Objectives Eyepieces: Huyghenian, compensating, 

 holoscopic, Kellner, projection, and binocular Standard 

 gauges for eyepieces - - 48-83 



CHAPTER III. 



ILLUMINATION AND ILLUMINATING APPARATUS. 



Monochromatic light and light filters Sub-stage condensers 

 Aplanatic apertures of condensers How to use the con- 



