INDEX, 



Absorption: 



Beer's Law of, 25, 33, 39. 

 Coefficient of, 30-33. 

 Eosin, 189. 

 Resorufin, 189. 

 Fluorescence, 167-174. 

 -Esculin, fluorescence and transmission spectra of, 23. 

 Andrews, preparation of phosphorescent compounds, 



110. 

 Angstrom, distribution of energy in flame of Hefner 



lamp, 178. 

 Anthracene vapor: 



Fluorescence of, 163. 



Effect of fluorescence on conductivity of, 163, 106. 



Balmain's paint: 



Fluorescence spectrum of, 97. 

 Phosphorescence decay of, 67, 68, 211. 

 Effect of 



Delay in heating, 105, 106. 

 Infra-red rays, 81. 

 Previous history, 100. 

 Temperature, 97-101. 

 Time of excitation, 97, 101, 102, 103, 133, 

 134. 

 Hysteresis effect in, 63. 

 Law of, 202, 203. 



Thermo-luminescence of, 102-107. 

 Becquerel, Ed.: 



Cause of change in phosphorescence color, 49. 

 Phosphorescence decay, 51, 52, 53, 67, 202. 

 Becquerel, H., phosphorescence decay, 51, 52, 53, 131, 



202, 203. 

 Beer's law, 25, 33, 39. 

 Buckingham, ionic theory of fluorescence, 26, 39. 



Burke: 



Change in absorption due to fluorescence, 147. 

 Fluorescence absorption, 167. 



Cadmium salts: 



Fluorescence of, 112, 113, 114. 

 Cadmium-sodium compounds 

 Decay curve of, 121, 124. 

 Phosphorescence spectra of, 120. 

 CdSOi+xMnS'Ch: 



Kathodo-luminescence of, 139. 

 Luminescence of, by ultra-violet light and by 

 Roentgen rays, 139. 



Camichel: 



Conductivity of fluorescent liquids, lol, 198. 

 Fluorescence absorption, 167. 

 Canary glass, fluorescence and transmission spectra of, 



19. 

 Chlorophyll, fluorescence and transmission spectra of, 



17, 18. 

 Coblentz, W. W.: 



Absorption bands in spectrum of ZnS, 84. 

 Energy of acetylene spectrum, 175, 179. 

 Infra-red spectrum of chlorophyll, 17, 18. 

 Conductivity of solutions, effect of light on, 147, 150, 



151, 198. 

 Cunningham, J. A., effect of light on the conductivity 

 of solutions, 147, 198. 



Dahms, effect of infra-red rays on phosphorescence, 



71, 77, 83. 

 Darwin, phosphorescence decay, 51, 68. 

 Decay of phosphorescence (see Phosphorescence). 

 Distribution of energy: 



In acetylene flame, 125, 178, 179. 

 In Hefner lamp flame, 178. 

 In spectra of 

 Eosin, 186. 

 Fluorescein, 186. 

 Resorufin, 186. 

 Sidot blende, 125-129. 

 Distribution of intensities in spectra of 

 Daylight, 14, 15. 

 Eosin, 182. - 

 Fluorescein, 182. 

 Resorufin, 182. 



Elster and Geitel, photo-electric activity of lumines- 

 cent substances, 198 

 Elston, spectra of anthracene vapor, 163. 

 "Emanations-pulver": 



Decay of phosphorescence, 67. 



Effect of infra-red rays, 75, 76, 77, 81. 

 Energy, distribution of (see Distribution). 

 Eosin: 



Coefficient of absorption, 190. 



Distribution of energy in spectrum, 186. 



Distribution of intensities in spectrum, 182. 



Fluorescence spectra, 9. 



Fluorescence vs. exciting power of various wave- 

 lengths, 192, 193. 



Photo-electric action, 159, 161. 



Fluorescein: 



Distribution of energy in spectrum, 186. 

 Distribution of intensities in spectrum, 182. 

 Effect 



Of absorption, 6. 

 Of dilution, 7, 8. 

 Spectra, 5, 6, 9. 

 Photo-electric action, 161. 

 Fluorescence, 25. 



As a function of wave-length, 9. 

 Absorption, 167-174. 

 And absorption of 



Uranium glass, 19, 20. 

 Chlorophyll, 17. 

 Quinine sulphate, 16. 

 Effect of dilution on, 26, 35, 36. 

 Specific exciting power for various wave-lengths, 



192-194. 

 Spectrum, 5, 6, 9, 10, 12, 13, 15, 17, 19, 22,[23, 87. 

 Effect of 



Solvent, 23. 

 Temperature, 135. 

 Distribution of energy in, 125, 126, 127. 

 Fluorite, transmission and fluorescence spectra, 21, 22. 



Gibbs, R. C, fluorescence and absorption'of uranium 



glass, 20. 

 Goldman: 



Effect of light on ionization of liquids, 151. 



Photo-electric effect, 163, 198. 



Hagenbach: 



Stokes's law, 1. 



Fluorescence of chlorophyll, 17. 

 Henry, Ch.: 



Conduction of iodine vapor due to light, 163. 



Law of phosphorescence decay, 51, 52. 

 Hodge, P., photo-active cells with fluorescent electro- 

 lytes, 152, 162, 198. 

 Houstoun, R. A., fluorescence absorption, 167. 

 Howe, H. E., relation of fluorescence to conductivity, 

 163, 198, 



Infra-red rays: 



Effect in suppressing phosphorescence, 134, 135. 

 Effect on 



Decay of phosphorescence, 72, 73, 77-82, 84. 

 Phosphorescence when applied during excita- 

 tion, 75. 

 Intensity, distribution of (see Distribution). 

 Ionization: 



Of liquids by light waves. 150, 151. 

 Theory of luminescence, 26, 39, 121. 

 Ives and Luekiesh: 



Effect of infra-red rays on decay of phosphores- 

 cence, 77, 78. 

 Form of phosphorescence spectrum, 204. 



Kathodo-luminescence: 



Dependence of, upon current and potential differ- 

 ence, 143, 144. 

 Equation for intensity of, 144. 

 Of various substances, 139, 144. 

 Kester, phosphoroscope, 118. 



Knoblauch, O., effect of solvent o fluorescent spec- 

 trum, 23. 

 Kundt, effect of solvent on absorption bands, 23. 



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