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. 4g 
Polarized light. 50 
Testing and adjusting the polarizing microscope. 54 
CHAPTER III. 
Microscopes for Use in Chemical Laboratories. 
Specifications for chemical microscopes. 
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. 81 
Special forms of vertical illuminators. 82 
Maintaining the alignment of illuminator and radiant. 87 
Mounting polished specimens for study. 89 
Metallurgical microscopes, metallographs. go 
Shop or Works microscopes. loi 
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. 116 
The cardioid ultramicroscope. 117 
The reflecting prism ultramicroscope of Cotton and Mouton. 120 
