15S 



INDEX. 



Ferricyanide of potassium in water 28 



Ferrocyanide of potassium in water 27 



Fluorescent and phosphorescent spectra 



of uranyl salts 116 



Foreign salts, effect of the presence of, 



on absorption spectra 134 



Gases, spectra of 3 



Glycerol solutions 134 



of cobalt salts 34 



of erbium chloride ... 63 

 of neodymium salts. . 78 

 of uranous chloride. .126 

 of uranyl chloride. ... 97 



Hydrochloric acid, effect of, on the 

 uranyl acetate bands 97 



Isomerism, dynamic, theory of 12 



Liquids and solids, spectra of 6 



Methods, experimental, used 19 



of studying emission and ab- 

 sorption spectra 16 



Neodymium nitrate in nitric acid 79 



salts 69 



in aqueous solution, 

 effects of temper- 

 ature on absorp- 

 tion spectra of. . . 72 



in glycerol 78 



Nickel acetate 44 



chloride 43 



in water, conductivity 



and dissociation 45 



nitrate in water, conductivity 



and dissociation 45 



salts 43 



sulphate 44 



Nitrate of chromium 53 



of cobalt 37 



of copper 47 



of praseodymium 66 



of uranyl. 86, 87 



Nitric acid solution of neodymium ni- 

 trate 79 



Organic absorption spectra 10 



Phosphorescent and fluorescent spectra 



of uranyl salts 116 



Plates, description of 147 



Potassium chromate 25 



dichromate 26 



ferricyanide in water 28 



ferrocyanide in water 27 



salts, absorption spectra of . . 23 



Praseodymium chloride 65 



nitrate 66 



salts 65 



Previous work, review of 31 



Results, discussion of 137 



Review of previous work 31 



Solids and liquids, spectra of ... 6 



Solution, solvate theory of 142 



Solvate theory of solution 142 



Spectra and atomic structure 9 



banded 7 



of gases 3 



of liquids and solids 6 



Spectrophotography of chemical reac- 

 tions 79 



Spectrophotography of chemical reac- 

 tions of uranyl salts 112 



Spectroscopic investigations, recent 1 



Spectrum method of chemical analysis . . 8 



problems, complex 13 



Stark's theory 13 



Sulphate of chromium 53 



of cobalt 38 



of nickel . 44 



of uranyl 88 



Sulphocyanate of cobalt 40 



Summary of results with cobalt salts ... 42 

 with neodymium 



salts 83 



Temperature, effect of, on the absorption 



spectra of aque- 

 ous solutions of 

 neodymium 



salts. 72 



on erbium chlo- 

 ride in water. . 63 

 on uranyl acetate 112 

 chloride . 98 

 nitrate . . 106 

 sulphate. 108 



Theory of chromophores 11 



of dynamic isomerism 12 



of Stark 13 



Tysonite 61, 62 



Uranium compounds, absorption spectra 



of 85 



salts 85 



alcoholic solutions of . . . . 133 

 Uranous acetate, absorption spectrum 



of 131 



in glycerol 132 



in methyl alcohol and 



acetic acid 131 



and aluminium chlorides in 



water 123 



and uranyl acetates 130 



bands, effect of the presence of 



acids on 128 



bromide 130 



chloride, effect of temperature 

 on the absorption 



spectrum of 132 



in acetone and water 125 



in glycerol 126 



and water. 126 

 in hydrochloric acid 

 and acetone 124 



