INDEX 471 



PAGE 



Depressions, recognition of 31 



Diaphragms, use of 21 



Differential color illumination 47 



Dimorphous crystals 251 



Directions of elasticity 256 



vibration 256 



Disk vertical illuminators 78 



Dispersion of optic axes 258 



Dispersive power of liquids 233 



Distillation 292 



apparatus 293, 295 



Distilling tubes 295 



Drawing cameras 127 



adjustment of 129 



oculars 130 



Draw tube 4 



Ebonite tubes 147 



Elasticity, axes of : 256 



Electrochemical series 301 



Elevations, recognition of 31 



Estimation of molecular weights 213 



Etching 439 



liquids 441 



Evaporators for microchemistry 152 



Experiments in crystallization ' 269 



Extinction 253 



angles 264 



Extraordinary ray 52 



Eyepieces, compensating 15 



cross-haired 55 



drawing 130 



goniometer 15 



Huygens 12 



micrometer 181 



negative 12 



net ruled 202 



positive 12 



projection 15 



Ramsden 12 



Eye-point 13 



Ferricyanides, detection of 424 



Ferrocyanides, detection of 425 



Fibers, textile, preparation of, as reagents 447 



use of, in analysis 308 



