INDEX 
471 
PAGE 
Depressions, recognition of. 
Diaphragms, use of. 21 
Differential color illumination... 47 
Dimorphous crystals. 251 
Directions of elasticity. 256 
vibration. 256 
Disk vertical illuminators. 7^ 
Dispersion of optic axes. 258 
Dispersive power of liquids. 233 
Distillation. ^92 
apparatus.293, 295 
Distilling tubes. ^95 
Drawing cameras. ^27 
adjustment of. 129 
oculars. ^ 3 ° 
Draw tube. 4 
Ebonite tubes. ^47 
Elasticity, axes of.. 
Electrochemical series. 3 °^ 
Elevations, recognition of. 3 i 
Estimation of molecular weights. 213 
Etching. ; .-. 439 
liquids. 441 
Evaporators for microchemistry. 152 
Experiments in crystallization. 269 
Extinction. ^53 
angles. ^^4 
Extraordinary ray. 52 
Eyepieces, compensating. ^5 
cross-haired. 55 
drawing. ^ 3 ° 
goniometer. ^5 
Huygens. 
micrometer. 
negative. ^ ^ 
net ruled. 
positive. ^ ^ 
projection. ^5 
Ramsden. 
Eye-point. 
Ferricyanides, detection of. 424 
Ferrocyanides, detection of. 42 $ 
Fibers, textile, preparation of, as reagents. 447 
use of, in analysis. 3°^ 
