INDEX 293 



Measuring the refraction index of liquids (differential process) 206 



Measuring the refraction index of liquids (full-duplication process) 197 



Measuring the surface slopes 142 



Measuring thickness with interference microscope 212 



Melting point (determination of) 213, 215, 218, 271 



Menzel's interference microscope 127 



Menzel's method (reflected light) 139 



Microscope (high precision-measurement) 172 



Microspectrophotometric measurements 255 



Microscope objectives (ultra-violet and infra-red) 228 



Microspectrophotometry 242 



Microspectrophotometry (basic system with photo-cell) 247 



Microspectrophotometry (double beam device) 244 



Microspectrophotometry (errors) 258 



Microspectrophotometry (fluorescence) 263 



Microspectroscopy 242 



Mirau interference microscope 146 



Mixed fusion 274 



Multi-wave interference microscopes 122 



Newton's colour scale 185 



Nomarski and Bernstein reflecting objective 234 



Nomarski interference microscope (reflected light) 149 



Nomarski quartz plate device 131 



Nomarski's interference microscope (transmitted light) 118 



Normal in a point of a small reflecting surface 169 



Norris and Wilkins solid reflecting objective 235 



Object illuminated in monochromatic light (microspectroscopy) 243 



Object illuminated in white light (microspectroscopy) 254 



Oblique illumination 48 



Oblique illumination in reflected light 136 



Optical filtering of a photographic image 61 



Optimum magnification 34 



Optique Precision de Levallois hot stage 270 



Osterberg's polanret microscope 82 



Path difference (measurement) 174 



Path difference (measurement by full-duplication process) 181 



Path difference (measurement by the fringes process) 187 



Path difference (measurement with the differential process) 199 



Path difference (measurement with the flat-tints method) 199 



Path difference produced by a shift of the focusing plane 10 



Payne's device (phase contrast) 86 



Peltier-effect applications to hot stage 269 



Perception limit 48 



Perception limit (effects of stray light) 75 



Perception limit of a perfect instrument (numerical values) 58 



Periodic object (coherent and partially coherent illummation) 43 



Periodic object (coherent illumination) 44 



Periodic object in incoherent illumination 37 



