X TABLE OF CONTENTS 



CHAPTER VII 



l'A<JK 



The Demonstration of the Fall of Spores by means of a Beam of Light . 94 



CHAPTER VIII 



The Spore-fall Period 102 



CHAPTER IX 



Desiccation of Fruit-bodies — A Xerophytic Fungus Flora — The genus 



Schizophyllum . . . . . . . . . . . .105 



CHAPTER X 



External Conditions and Sporc-dischargo — The Effect of Light — The Effect 

 of Gravity — The Effect of the Hygroscopic Condition of the Air — The 

 Effect of Heat —The Effect of Alteration in the Gaseous Enviioiiinent 

 —The Effect of Antesthetics 120 



CHAPTER XI 



The Violent Projection of Spores from the Hymenium — Methods I., TT.. TIT., 



IV., and V i;33 



CHAPTER XII 



The Mechanism of Spore-discharge ........ 148 



CHAPTER Xlll 

 The Specific Gravity of Spores . . . . . . . . . lo3 



CHAPTER XIV 

 The Size of Spores — Poynting's Plate Micrometer . . . . . .158 



CHAPTER XV 



The Rate of Fall of Spores and Stokes' Law — Appendix . . . . 1G4 



CHAPTER XVI 



The Effect of Humidity on the Rate of Fall of Spores 179 



CHAPTER X\ 11 



The Path of the Spores between the Gills, &c. — The Sporabola — Appendix 



on the Motion of a Sphere in a \iscous Medium, by Dr. Guy Barlow . 184 



