295 



CHEMICAL ARRANGEMENT 



OF THE 



SPECIES. 



PRELIMINARY OBSERVATIONS. 



THE nomenclature adopted in the present Tabular view 

 of the chemical relations of the species, has been taken 

 from an unpublished manuscript, by Mr. J. D. DANA. It 

 resembles in several points that by BEKZELIUS. Its pecul- 

 iarities, however, are numerous, and hence a brief outline 

 of its rules becomes necessary. 



The elements are divided into two classes, \moJlmphi- 

 gen and Oudegen Elements ; the former containing those 

 which are electro-negative in acid and basic compounds, the 

 second those whose mutual combinations produce neither 

 acids nor bases.* 



The binary compounds are named as follows : the adjec- 

 tive part of the name is derived from the name of the most 

 electro-positive element, if the two elements of the com- 

 pound are of the same class : but from the oudegen ele- 



* This distinction is natural, each element which is electro-negative 

 in a clas of acids, is also electro-negative in a class of bases, with which 

 'the acid may unite and form salts. On the contrary, those elements 

 which lo not give rise to acids, do not give rise to bases. 



