43 DOMAIN VIII. DIAMICTONIC. 



NOME III. SIDERITE, WITH FELSPAR. 



[FIRMICITE, from Julius Firmicus, who flou- 

 rished under Constantino I. and first mentions 

 alchemy, " scientiam alchemize*."] 



The graustein of Werner is an intimate mix- 

 ture of siderite with white felspar, which last 

 often predominates. According to Mr. Jame- 

 son j* it contains olivine and augite,like basaltin, 

 and sometimes passes into that substance. It is 

 frequent near Vesuvius, and in some other parts 

 of Italy. 



NOME IV. SIDERITE, WITH EARTHY 

 FELSPAR. 



[SYNESITE, from Synesius, one of those Greek 

 philosophers, in Egypt, who cultivated this 

 Science, A. D. 400.] 



This combination has been described by Saus- 

 sure. The mixture of siderite and felspar, in 



* Matheseos iii. 15. Orosius first states, that Diocletian burnt 

 the books of the Egyptians. 

 f iii. 190. 



