CONTENTS. 
INTRODUCTION 
jBart First. 
PHOSPHORESCENCE OF MINERALS. 
CHAPTER 
I. 
II. 
Ait. 
Vi. 
PHOSPHORESCENCE AFTER INSOLATION . 
PHOSPHORESCENCE BY HEAT 
PHOSPHORESCENCE BY CLEAVAGE, FRICTION, PER- 
CUSSION, CRYSTALLIZATION, AND MOLECULAR 
oR CHEMICAL CHANGE 
PHOSPHORESCENCE OF GASES 
METEOROLOGICAL PHOSPHORESCENCE 
. DuRATION, INTENSITY, AND COLOUR OF PHOs- 
PHORIC Ligut IN MinreRAt Bopies 
INVISIBLE PHOSPHORESCENCE 
PAGE 
11 
18 
70 
72 
