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 



