CONTENTS 



CHAPTER I 



PAGES 

 INTRODUCTORY 



Photography, its field and how to enter upon it . . . 1-4 



CHAPTER II 



THE MICROSCOPE 



Its Mechanical Parts The Forms best suited for the Purpose in 



View Some Typical Instruments ..... 5-17 



CHAPTER III 



THE OPTICAL EQUIPMENT*. OBJECTIVES AND OCULARS 



Objectives Dry- and Immersion -lenses Achromatic and Apo- 

 chromatic Systems Penetration Flatness of Field Testing 

 of Objectives Resolving Power Objective - changers The 

 Ocular or Eye-piece, Ordinary and Compensating Projection- 

 oculars . . . .... . . 18-45 



CHAPTER IV 



THE OPTICAL EQUIPMENT (continued): CONDENSERS AND 

 COLLECTING-LENSES 



The Mirror Abbe Condensers Achromatic and Oil-immersion 

 Condensers The Aplanatic Cone Dark-ground Illuminators 

 Illuminators for Opaque Objects, Vertical and Oblique Illu- 

 minators Auxiliary Collecting-lenses .... 46-74 



CHAPTER V 



SOURCES OF ILLUMINATION 



Oil Lamps Welsbach Gas Acetylene Generators for Acetylene 

 Lime-light Electrical Illuminants Nernst Lamp Mercury- 

 vapour Lamp The Electric -arc Sunlight . . . ' 75-110 



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