X CONTENTS 



PAGE 



Objectives for use with dark-field illuminators 40 



Resolving power with dark-field illuminators 41 



Adjustment of dark-field illuminators 42 



Orthogonal illumination 47 



Differential color illumination 47 



Ultraviolet ray illumination 48 



Fluorescence microscope 49 



Polarized light 50 



Testing and adjusting the polarizing microscope 54 



CHAPTER III. 



MICROSCOPES FOR USE IN CHEMICAL LABORATORIES. 



Specifications for chemical microscopes 59 



Microscopes for general chemical microscopy 61 



Large stage microscopes 64 



Comparison oculars 66 



Comparison microscopes 67 



Hot stage microscopes 71 



Binocular microscopes, Greenough-type 72 



Petrographic microscopes 75 



CHAPTER IV. 



VERTICAL ILLUMINATORS; METALLURGICAL MICROSCOPES. 



Simple vertical illuminators 77 



Adjustment of vertical illuminators 78 



Interpretation of appearances 8 1 



Special forms of vertical illuminators 82 



Maintaining the alignment of illuminator and radiant 87 



Mounting polished specimens for study 89 



Metallurgical microscopes, metallographs 90 



Shop or Works microscopes 101 



CHAPTER V. 



ULTRAMICROSCOPES; APPARATUS FOR THE STUDY OF ULTRAMICROSCOPIC 

 PARTICLES. 



The principle of the Ultramicroscope 105 



Brownian motion 106 



The diffraction images of ultramicroscopic particles 108 



The slit ultramicroscope and its adjustment 109 



Reflecting condenser ultramicroscopes 1 16 



The cardioid ultramicroscope 117 



The reflecting prism ultramicroscope of Cotton and Mouton 1 20 



