262 Mr Conneirs Analysis of several Species of' 



possessed \tas then occupied by her sick husband. Fortunate- 

 ly, however, Andorra possessed another, the master of which 

 obligingly offered us his own bed, which we accepted. 

 ( To he continued.) 



Analysis of several Species of the Zeolite Family from Scot- 

 tish Localities. By A. Connell, Esq. Communicated by 

 the Author. 



Although the greater number of the species of the zeolite 

 family have been often analysed, yet, in so far as I know, no 

 analysis of the following minerals from the particular localities 

 there mentioned has been made public ; and it is obviously of 

 great importance, with a view to an accurate knowledge of the 

 atomic constitution of minerals, that an examination should be 

 made of individual minerals, from as many different localities 

 as possible. It is thus that we shall best learn what ingredients 

 and what proportions are essential to the true constitution of 

 the several mineral substances, and what merely result from ac> 

 cidental circumstances peculiar to the several localities. 



1. Chabasite, Hauy^ — Rhom.boidal Zeolite, Jameson. 



The first mineral which I shall notice is Chabasite or Rliom- 

 boidal Zeolite, the analysis of which, although it has been often 

 repeated, possesses considerable interest, because this substance 

 has been selected by Berzelius as one of his illustrations of the 

 doctrine now so universally adopted by the Swedish and German 

 chemists, that certain ingredients of minerals are capable of re- 

 placing one another in variable proportions, without effecting 

 any change in the essential nature of the species, or in its crystal- 

 line form. According to these chemists, there are, as is well 

 known, two classes, the substances respectively contained in which 

 are capable of mutually replacing one another in mineral substan- 

 ces. The one of these consists of those oxides which contain one 

 atom of oxygen only. Such are, lime, magnesia, the fixed alkalies, 

 protoxide of iron, &c. The other embraces those oxides which, 

 according to the peculiar views of Berzelius, contain three atoms 



