472 
INDEX 
PAGE 
Files, method of using, to prepare metals for study. 435 
Films of material for analysis, preparation. 303 
Filter tubes. 285 
Filtration. 284 
Fluorescence microscope. 4g 
Fluorides as reagents, precautions. 316 
Forceps. .149, 155 
Fusions. 296 
Gas lamps. 
Gases, testing for evolution of. 311 
Glass, refractive index of. 243 
Glass rods. 143 
Glycerin, use of. 302 
Grade of abrasive wheels. 432 
Grain of abrasive wheels. 432 
Graduated circles, testing of. 36 
Grain size, determination of. iq3 
Greenough-type microscopes. 71 
Grinding material for analysis. 297 
opaque objects for microscopic study. 431 
I wheels. 431 
Groimd glass with Abbe condenser. 27 
loss of light in using.•.. i6i 
Habit of crystals. 252 
Hack saws, small. 169 
Half-shadow illumination. 231 
Hasmacytometer cells. 206 
Hemihedral crystals. 251 
Hemimorphic crystals. 251 
Hemispheres for orientation. 142 
Hexagonal system, characteristics of. 267 
Holohedral crystals. 251 
Hot stages.220, 222 
Hydrofluoric acid as a reagent. 316 
Idiomorphic crystals. 251 
Ignition. 296 
Illumination. 20 
dark-field. 36 
differential color. 47 
dual. 35 
orthogonal. 47 
polarized light. 50 
reflected light.. 29 
with Silverman lamp. 33 
