264 



INDEX. 



PAGE. 



Results, discussion of 134 



obtained in earlier work .... 9 



summary of, general 232 



Sodium acetate 41 



ammonium acid phosphate. ... 40 



bromide 34 



carbonate 37 



chloride 33 



chromate 37 



dichromate 38 



hydroxide 41 



iodide 35 



nitrate 36 



phosphate 39 



salts 136 



sulphate 36 



Solutions 6, 186, 244 



aqueous 161 



non-aqueous 241 



Spectrograms and exposures 180 



Spectrograph 169 



Spectroscope 170 



Strontium bromide f>9 



chloride 58 



iodide 60 



nitrate 61 



salts 137 



Substances employed in earlier work ... 9 



that have been studied 30 



Succinic acid 113 



Sugar 109 



Sulphate of aluminium 89 



ammonium 51 



cadmium 73 



cobalt . . S3 



PAGE. 



Sulphate of copper 86 



magnesium 69 



manganese 76 



nickel 79 



potassium 44 



sodium 36 



zinc 71 



Sulphuric acid 97 



Summary and conclusions 144 



of results, general 232 



Tartaric acid 114 



Temperature coefficients of conductivity, 

 bearing of hydrates 



on 153 



on water of crystallization, 

 effect of, as bearing 

 on the theory of hy- 

 drates in solution ... 17 



Theories, discussion of the several 232 



Uhler, work of 161 



Urea 105 



Water of crystallization and lowering of 



freezing-point, relation between. ... 20 

 Water of crystallization, effect of tem- 

 perature on, as bearing on the 



theory of hydrates in solution 17 



Water of crystallization greater the 



lower the temperature 18 



Wave-lengths of reference lines 185 



West, work of 154, 156 



Zinc chloride 70 



nitrate 70 



salts 138 



sulphate 71 



