xxii List of Illustrations 



Following 

 page 



Fig. 21. Title page of a thesis by Vulpius on Ignis Lamhens, 



1686 202 



22. Title page of Heusinger's thesis, De Noctiluca Mer- 



curiali, 1716 250 



23. Title page of Hauksbee's book, Physico-mechanical 



Experiments (1709) on electroluminescence . . 250 



24. Hauksbee's electrical machine and evacuated vessels 250 



25. Abbe Nollet's experiments on light in glass vessels . 250 



26. Large electrical machine used for experiments at the 



Pantheon 250 



27. Luminescence in vacuum tubes (De la Rue and 



Muller, 1883) 298 



28. Various types of Geissler tubes 298 



29. Title page of La Galla's book, De Phenomenis, etc., 



1612 298 



30. Title page of Liceti's Litheosphorus, 1640 . . . 298 



31. Frontispiece of Cellio's book on Pietra Bolognese, 



1680 346 



32. Title page of Marsigli's pamphlet, Del Phosphoro 



Minerale, 1698 346 



33. Marsigli's drawings of the Bononian stone . . . 346 



34. Title page of Mentzel's book comparing Bononian 



and hermetic phosphor, 1676 346 



35. Luminescent effects obtained with phosphorus by 



Elscholtz (1681) 426 



36. Title page of Kirchmaier's pamphlet, De Phosphoris 



et Natura Lucis nee non de Igne, 1680 .... 426 



37. Title pages of Boyle's books on Colours (1664) and 



The Aerial Noctiluca (1680) 426 



38. Adler's (1752) luminous worm 426 



39. Early drawings of the luminous protozoan, Noctiluca 



miliaris 426 



40. Ehrenberg's (1834) figure of luminous dinoflagel- 



lates 426 



41. Waller's (1685) flying glowworm 538 



42. De Greer's (1755) plate, showing development of 



the glowworm 538 



