HAP. T. 



Page. 



Introductory Remarks on the Methods of ar- 

 ranging Rocks whi-ch have been adopted by 

 different Mineralogists. 1 



CHAP. II. 



On the meaning in which the term Rock is here 

 used, and on the General Plan of the present 

 Arrangement ; with Remarks on the Nomen- 

 clature adopted : 40 



CHAP. III. 



On the Classification of Rocks adopted in the 

 present arrangement 56 



CHAP. IV. 



General Catalogue of the Families of Rocks con- 

 tained in the present arrangement 77 



CHAP. V. 



Remarks on the general Catalogue of the Rocks 

 contained in this arrangement, and on the Order 

 of their Succession in Nature 81 



