TABLE OF CONTENTS. 



PAGE 



INTRODUCTION 1 



PRELIMINARY PRACTICE WITH THE MICROSCOPE 5 



FERN 7 



EARTHWORM 13 



AMCEBA 24 



WHITE BLOOD-CORPUSCLES 26 



H^EMATOCOCCUS 27 



PARAMCECIUM 30 



VORTICELLA , 33 



YEAST 36 



PENICILLIUM 39 



LICHEN 41 



MUSHROOM , 43 



BACTERIA 45 



SPIROGYRA 48 



HYDRA 52 



FRESH-WATER MUSSEL 58 



LOBSTER 66 



Moss. 75 



SPERMAPHYTES . 79 



Stem 79 



Root 82 



Bud 82 



Leaf 83 



Flower 84 



Seeds 87 



Seed-contents 90 



Seedlings 91 



V 



