Contents xvii 



PAGE 



Chapter XI. Fluorescence 390 



Introduction 390 



Lignum Nephriticum and Athanius Kircher . . 391 



Grimaldi, Boyle, and Newton 392 



Eighteenth-Century Observations 394 



Brewster, Herschel, and Stokes 394 



Research after Stokes 398 



Methods of Excitation 398 



Fluorescence Distribution and Fluorescence Analysis 400 

 Chemical Constitution and Fluorescence . . . .401 



Properties of Fluorescent Light 402 



Quenching of Fluorescence 405 



Vapor Fluorescence and Resonance Radiation; Sensi- 

 tization 406 



Books on Fluorescence 407 



Chapter XII. Radioluminescence 410 



Introduction .... 410 



Cathodoluminescence 410 



Anodoluminescence 415 



Radioluminescence Proper 416 



From Roentgen Rays 416 



From Radium Rays 417 



Scintillation Counters and New Particles .... 420 



Chapter XIII. Chemiluminescence 423 



Introduction 423 



The Gaseous Chemiluminescence of Phosphorus . 424 



Discovery of Phosphorus 424 



Robert Boyle and Colleagues 427 



Eighteenth-Century Experiments 433 



Relation to Oxygen 436 



Relation to Water Vapor 440 



Quenching of Luminescence 441 



Periodic Phenomena 442 



Relation to Ozone 442 



Commercial Use 445 



Medical Use 446 



Miscellaneous Chemiluminescent Phenomena in Gases 448 



