CONTENTS 



CHAPTER I 

 Early Days of the Microscope . . . . 17 -' 



CHAPTER II 

 Some Early Microscopists 29''^ 



CHAPTER III 



The Action of Light 40 



CHAPTER IV 

 The Compound Microscope 60 -^ 



CHAPTER V 



Animal Life in Ponds and Streams . , , 66 



CHAPTER VI 



Plant Life in Ponds and Streams ... 83 



CHAPTER VII 



The Microscope and Plant Life .... 97 



CHAPTER VIII 



Animal Life and the Microscope . . . 112 , 



9 ^ 



