6 CONTENTS. 



Page. 



Sap-rots of species of deciduous trees 52 



Sap-rot caused by Polystictus versicolor 53 



Sap-rot caused by Polystictus pergamen us 56 



Sap-rot caused by Fomes applanatus 58 



Decay caused by Stereum frustulosum 60 



Sap-rot caused by Daedalea quercina 61 



Other sap-rotting fungi 61 



Decay of structural timber 62 



Causes of decay 62 



Factors favoring decay 62 



Rate of decay 63 



Manner of infection 64 



Susceptibility to decay 65 



Preventive methods 66 



Bibliography 69 



Description of plates 76 



Index 77 



149 



