CONTENTS. 



INTRODUCTION. 

 GENERAL CONSIDERATIONS ON ANIMAL AND VEGETABLE 



LIFE, - ---13 



PART I, 

 HISTOLOGY OF PLANTS AND ANIMALS. 



CHAPTER I. 



ON THE INDIVIDUALITY OF THE CELLS, - .;- - - 31 

 On the Chemical Composition of the Vegetable 

 and Animal Tissues, - - - - - 47 



CHAPTER II. 



ON THE DEVELOPMENT AND PROPAGATION OF 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. 



Ox THE CONTRACTILITY OF THE TISSUES, - - - - 73 



