vin CONTENTS OF THE THIRD VOLUME. 



I A(VK 



CHAPTER V. RECEPTION AND CONFIRMATION OP THE DIS- 

 TINCTION OF SYSTEMS OF CRYSTALLIZATION. 

 Diffusion of the Distinction of Systems . . . .241 



Confirmation of the Distinction of Systems by the Optical 



Properties of Minerals. Brewster .... 242 



CHAPTER VI. CORRECTION OF THE LAW OF THE SAME 



ANGLE FOR THE *VME SUBSTANCE. 



Discovery of Isomorphism. Mitscherlich . . . 245 

 Dimorphism ........ 248 



CHAPTER VII. ATTEMPTS TO ESTABLISH THE Fixrrr OF 



OTHER PHYSICAL PROPERTIES. WERNER . . 250 



SYSTEMATIC MINERALOGY. 



CHAPTER VIII. ATTEMPTS AT THE CLASSIFICATION OF 

 MINERALS. 



Sect. 1. Proper Object of Classification .... 253 

 Sect. 2. Mixed Systems of Classification . . 256 



CHAPTER IX. ATTEMPTS AT THE REFORM OF MINERALO- 

 GICAL SYSTEMS. SEPARATION OF THE CHEMICAL AND 

 NATURAL HISTORY METHODS. 



Sect. 1. Natural History System of Mohs . . . 262 

 Sect. 2. Chemical System of Berzelius and others . 267 

 Sect. 3. Failure of the Attempts at Systematic Reform . 270 

 Sect. 4. Return to Mixed Systems with Improvements 275 



CLASSIFICATORY SCIENCES. 



BOOK XVI. 



HISTORY OF SYSTEMATIC BOTANY AND ZOOLOGY. 

 Introduction ......... 286 



CHAPTER I. IMAGINARY KNOWLEDGE OF PLANTS . 287 

 CHAPTER II. UNSYSTEMATIC KNOWLEDGE OF PLANTS . 292 

 CHAPTER III FORMATION OF A SYSTEM OF ARRANGE- 

 MENT OF PLANTS. 



Sect. 1. Prelude to the Epoch of Ctesalpinus . . 306 

 Sect. 2. Epoch of Caesalpinus. Formation of a System of 



Arrangement . . . . . .312 



