TABLE OF CONTENTS. 



PAGE 



INTRODUCTION 11 



HISTORICAL 13 



PART FIRST. 



MORPHOLOGY OF THE BACTERIA. 

 CHAPTER I. ORGANIZATION. 



1. OF THE BACTERIA IN GENERAL 28 



Forms 28 



Dimensions 29 



Colors 31 



Movements 32 



Structure 35 



Cell-Membrane 35 



Protoplasm 36 



Cilia 39 



2. DIFFERENT MODES OF ASSOCIATION 43 



Form of Little Chain (Torula) 43 



Form of Zooglcea 44 



Form of Mycoderma, &c 45 



CHAPTER II. CLASSIFICATION AND DESCRIPTION. 



1. PLACE OF THE BACTERIA 48 



Among Organized Beings 53 



In the Vegetable Kingdom 55 



2. CLASSIFICATION 59 



Characters Generic and Specific 60 



Classification of Cohn . 65 



