INDEX 409 



PAGE 



Sphere-crystals -. 169 



Spherulites 169 



Spectroscopic ocular 106 



Stage, attachable mechanical 113 



method of centering 164 



Step micrometer 153 



Strontium, common salts 292, 293 



detection by bichromates 302 



oxalic acid 295 



sodium bicarbonate 303 



sulphuric acid 293 



Sublimation 240 



Subliming cell 243 



point determinations 220 



Sulphates, detection of 380 



Sulphites, detection of 381 



Sulphocyanates, detection of 381 



Sulphuric acid, reagent in qualitative analysis 367 



Supports for objects 123 



Symmetrical extinction 171 



Tables for microscopic work 129 



Tartrates, detection of 381 



Testing graduated stages 165 



polarizers and analyzers 165 



Tetragonal system, characteristics of 181 



Thickness, measurement of 200 



Thomae cell 60 



Thiosulphates, detection of 381 



Tin, common salts 346 



detection by cesium chloride 347 



Tongs 129 



Trichites 169 



Triclinic system, characteristics of 182 



Trimorphous crystals 169 



Tungsten lamps for microscopy 136 



Turmeric-linen or -silk fibers 271 



Ultracondenser, Jentzsch 71 



reflecting 65 



Ultramicrons 56 



Ultramicroscopes 54, 57, 66, 67, 69, 72 



Ultramicroscopic studies, preparing solids for 63 



Ultraviolet ray illumination . . .' 51 



Uniaxial crystals 171, 194 



Vapors, tests involving 266 



Velocity of abrasive wheels 387 



