CONTENTS. 



INTRODUCTION. 



General consideeations on Animal and Vegetable 



LlEE, - 13 



PART I. 



HISTOLOGY OP PLANTS AND ANIMALS. 



CHAPTER I. 

 On the Inditidualitt op the Cells, - - 31 



On the Chemical Composition of the Vegetable 

 and Animal Tissues, 47 



CHAPTER II. 



On the Development and Propagation op Cells, 51 



1. Formation of Cells from Nuclei, 51 



2. Formation of Cells by Division, 55 



3. Formation of Cells by Gemmation, - 59 



' CHAPTER III. 



On the Transformation of Cells into Tissues, 62 



CHAPTER IV. 



On the Contractility op the Tissues, 73 



