INDEX 



PAGE 



Abbe condenser, adjusting 25 



methods of employing 27 



Aberration, chromatic 2 



spherical 2 



Abrasives, abrasive papers 436 



Absorption of light by crystals 263 



Acetates, detection of 421 



Acicular crystals 251 



Acidification, methods for 302 



Acids, methods of testing for 417 



yielding precipitates with barium chloride 4ig 



no precipitates with barium chloride 419 



precipitates with silver nitrate 417 



no precipitates with silver nitrate 417 



set free from salts by acetic acid 4 jo 



sulphuric acid 420 



Acute bisectrix ^ . ". 257 



Adsorption, tests involving 309 



jEolotropic substances 51 



Agate mortars 297 



Air bubbles, optic behavior of 229 



test for axial light 26 



Alcohol, use of 305 



Alums 389 



Aluminum, common salts 387 



detection by cesium sulphate 388 



ammonium fluoride 391 



Amicrons 107 



Ammonium, common salts 332 



detection by chloroplatinic acid 332 



sodium phosphate 332 



Amorphous precipitates, treatment of 312 



Angular aperture of objectives 4 



Anions, testing for 415 



Anisotropic bodies 51 



crystals 253 



substances, refractive indices of 234 



Analysis of simple salts 414 



Analyzer 53 



467 



