viii CONTENTS 



PAGES FIG. 



CHAPTER V 127-159 75-98 



Magnification and Micrometry with the Microscope : Need of 

 magnification; Visual angle and the microscope; Magnification 

 and virtual and real images; Distance at which to determine 

 magnification; Ways to determine magnification; Camera 

 lucidae, ocular micrometers. 



CHAPTER VI 160-205 99-125 



Drawing and Class Demonstrations with the Microscope and 

 Projection Microscope: Drawing microscopic objects with the 

 camera lucida or with the projection microscope; Determining 

 the magnification at which the drawing is made; Avoidance of 

 inversion; Use of photographic prints to aid in making draw- 

 ings; drawings and their lettering for publication; Class demon- 

 strations. 



CHAPTER VII 206-245 126-143 



Photography with the Microscope and with Projection Appa- 

 ratus: Photographs of embryos, etc., with a vertical camera; 

 Photographing with a microscope; Lighting and experiments in 

 photography; Scale at which photographs are made; Daylight 

 glass for photographing with the microscope; Enlarging photo- 

 graphs; Color screens and color photography. 



CHAPTER VIII 246-269 144-150 



The Spectroscope and Polariscope and Then- Use with the 

 Microscope: Visible and invisible radiation; Kinds of spectra; 

 Micro-spectroscope and its use; Absorption bands; Micro- 

 polariscope and its use. 



CHAPTER IX 270-311 151-184 



Some Optical Principles Involved hi the Construction and Use 

 of the Microscope: Reflection, refraction, dispersion, diffraction; 

 Lenses and images; Spherical and chromatic aberration and their 

 .correction; Angular and numerical aperture; Diffracted light 

 in microscopy; Magnification of the individual parts of the 

 microscope; Parfocal oculars and objectives. 



