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the principles of chemic.il qualitative analysis in the dry and web way 

 would constitute the second and moie practical part. The stu^lent that 

 would deem this short study a fitting substitute for a i-egular course of 

 Chemistry would he making a mistake, yet I think it sufficient for the 

 purpose for which it is here intended. Besides, as you shall aee here- 

 after, the whole of the second part of our course is a continued illustra- 

 tion of the principles expounded in this chapter, and I do not think 

 that a student, after having followed the whole course of Mineralogy, 

 thus construed, would have much trouble in bf^coming acquainted with 

 Inorganic Chemistry. 



The third chapter devoted to the physical ch;iractjrs, would not 

 differ materially from what goes under that name in our text booki. 



I come now to the second part — ^Analytical Mineralogy — and this 

 is by far the most difficult as well as tiie most important part' of ray 

 work. First of all, you must not accept the word Analytical in the 

 same sense as we say Analytical Chemistry : In that sense it would 

 include only the determination of minerals. Tiie word analytical is 

 here spoken in opposition to the word- .synthetical, and does not mean 

 the analyses of minerals, but the analysis of the science. Analytical 

 ^Mineralogy is therefore the application of the principles of mineralogy 

 to every particular case. In the first part, we have seen what are the 

 general causes and laws which prevail throughout the mineral 

 kingdom ; in the second, we examine what effects nature has i>roduced 

 through their agency. In this sense it includes Descriptive Mineralogy, 

 but it comprehends also the determinative study. Indeed you remember 

 that I condemned the other systems for separating these two bra,nches 

 of the science. Therefore, my description of minerals must lead 

 directly to their determination. It is very easily said, but I should 

 prove myself veryagnorant of the subject if I thought this re-union could 

 be as easily performed. Far from believing it, I am really of the 

 opinion that, by using only these characters which have hitherto had 

 the exclusive right to be called mineralogical, the scheme must be 

 thoroughly impracticable, and you cannot find this strange, knowing 

 that the characters which are used now to determine minerals are not 

 at all those which guide us in their classification. Consequently, the 

 two series must remain perfectly independent, 



