CHAPTER X

.--TRANSITION FROM THE CHEMICAL TO THE CLASSIFICATORY

SCIENCES. 305

_THE ANALYTICO-CLASSIFICATORY SCIENCE._

## BOOK XV.

HISTORY OF MINERALOGY.

INTRODUCTION

_Sect._ 1. Of the Classificatory Sciences. 313 _Sect._ 2. Of Mineralogy as the Analytico-classificatory Science. 314

_CRYSTALLOGRAPHY._

## CHAPTER I .--PRELUDE TO THE EPOCH OF DE LISLE AND HAÜY. 316

## CHAPTER II .--EPOCH OF ROMÉ DE LISLE AND HAÜY.--ESTABLISHMENT OF

THE FIXITY OF CRYSTALLINE ANGLES, AND THE SIMPLICITY OF THE LAWS OF DERIVATION. 320

## CHAPTER III .--RECEPTION AND CORRECTIONS OF THE HAUÏAN

CRYSTALLOGRAPHY. 324 {14}

## CHAPTER IV .--ESTABLISHMENT OF THE DISTINCTION OF SYSTEMS OF

CRYSTALLIZATION.--WEISS AND MOHS. 326

##