INDEX. 



PAGE 



Abbe condenser, adjusting 33 



methods of employing 36 



Aberration, chromatic 2 



spherical 2 



Abrasives, abrasive papers 388 



Absorption of light by crystals 176 



Acetates, detection of 374 



Acicular crystals 169 



Acidification, methods for 254 



Acids, methods of testing for 368, 369 



yielding precipitates with barium chloride 372 



no precipitates with barium chloride 372 



precipitates with silver nitrate 370, 371 



no precipitates with silver nitrate 370 



set free from salts by acetic acid 373 



sulphuric acid 373 



Adsorption, tests involving 261 



^Eolotropic substances 159 



Agate mortars , 249 



Air bubbles, optic behavior of 187, 188 



test for axial light 35 



Alcohol, use of 257, 258 



Alums 343 



Aluminum, common salts 341 



detection by cesium sulphate 342 



ammonium fluoride 345, 270 



Amicrons 56 



Ammonium, common salts 286 



detection by chloroplatinic acid 286 



sodium phosphate 286 



mercuric sulphocyanate, preparation of 271 



as reagent 367 



Amorphous precipitates, treatment of 264 



Angular aperture of objectives 4 



Anions, testing for 3^9 



Anisotropic bodies J 59 



crystals i? 1 



substances, refractive indices of iQ3 



Analysis of simple salts 3^7> 3^9 



399 



