INDEX 
475 
Microscopes, metallurgical. 
as polarimeters. 
Microspectroscopes. 
adjustment and calibration 
Micellae. 
Microtomes. 
Monoclinic system, characteristics of. 
Mortars, agate. 
Mounting opaque objects for study. 
PAGE 
90 
166 
131 
13s 
107 
169 
268 
297 
89 
Nernst lamps for microscopy. 160 
Neutralization. 302 
Nickel, common salts. 410 
detection by glyoxime. 410 
phosphate. 412 
triple nitrite reaction. 412 
Nicol prisrn. 52 
Nitrates, detection of. 425 
Nitrites, detection of. 426 
Nosepieces. 164 
Object slides. 149 
for use with fluorides. 151 
Objective changers . 164 
Objectives, achromatic. 3 
adjustable. 3 
angular aperture of. 4 
aplanatic. 2 
care of. 10 
designation of. i 
for dark-field illumination. 40 
function of. i 
illuminating power of. 5,8 
immersion. 6 
light grasping power of. 5 
numerical aperture of. 5 
penetrating power of. 8 
photographic. 10 
resolving power of. 7 
selection of. 9 
variable. 6 
vertical illuminator. 80 
Oblique extinction. 253 
illumination with Abbe condenser. 24 
in refractive index determinations. 230 
Obtuse bisectrix. 257 
Ocular micrometer ratio. 182 
