CONTENTS 



INTRODUCTION 



FACE 



Amount and kind of knowledge required by practical men — 

 Familiarity with names and habits of parasites — Pre- 

 ventive measures — Cures — Rule-of-thumb methods of 

 doubtful value, . . .... 1-3 



FUNGI 



Nature of fungi — Saprophytes — Parasites — Mode of growth 

 of fungi — Reproduction of fungi — How parasitic fungi 

 infect their victims — How the spores of fungi are dispersed 

 — Modes of dissemination of disease that can be prevented 

 — Danger connected with pruning — Selection of shade 

 trees, .... 4-28 



LICHENES 



Nature of lichens — Saprophytes or parasites? ... 29 



ALGAE 



Nature of Algae, ......... 29 



MYXOGASTRES 



Nature of Myxogastres or ' Slime fungi ' — Germination of 



spores— Plasmodium stage, ... . . 29-30 



