. 257. PHYSIOCRAPHV. 15 



not only avoid future disputes and contradictions, but also 

 terminate those which have hitherto prevailed. Every 

 thing being thus preserved in its proper place, one will re- 

 gularly follow the other ; and there will not exist that mix- 

 ture of heterogeneous matter of information, which has been 

 till now called Mineralogy, without, however, having a just 

 title, according to its nature and principles, to be regarded as 

 such. Every one therefore of those sciences, which have 

 hitherto been but too frequently mixed up with one another, 

 thus confined within their respective limits, will entirely 

 become what it ought to be, and will not be prevented in 

 future by foreign considerations, from approaching nearer 

 perfection. It is of the greatest importance never to lose 

 sight of the succession of such sciences as refer to one and 

 the same object. 



Every step taken upon the methodical path, leads us 

 forwards ; and every one is equally important, since it be- 

 comes possible only upon the supposition of the preceding 

 one having been accomplished. It is Natural History which 

 takes the lead in this process ; and every scientific exami- 

 nation of a production of nature, must therefore begin with 

 its natural-historical determination. 



The following list contains some mineralogical works use- 

 ful in a more detailed study of mineral species, and which 

 have partly also been made use of in the physiographieal 

 department of the present Treatise : 

 A System of Mineralogy, in which minerals are arranged 

 according to the Natural History method. By Robert 

 Jameson. Third edition. Edinburgh, 1820. 

 Manual of Mineralogy : containing an account of simple 

 Minerals ; and also a description and arrangement of 

 mountain rocks. By Robert Jameson. Edinburgh, 1821. 

 An Elementary Introduction to the Knowledge of Mine, 

 ralogy, &c. By William Phillips. Third edition. Lon- 

 don, 1823. 



Handbuch der Mineralogie, von C. A. S. Hoffmann. Frei- 

 berg, 1811. Continued by A. Breithaupt. 



