392 Scientific Intelligence. 
map, we find also another variety quite different ; this is light green 
in color, soft, very ydrous, and has its feldspar as well as pyrox- 
ene very much altered. It is most characterized by its amygda- 
the moisture in igneous rocks found access to them while they 
re in process of eruption, we may re all these as results of 
changes wrought in what originally was essentially the same ma- 
terial by local causes in introducing m re accordance with 
this view the trap intersecting the crystalline rocks is anhydrous, 
alone 
other localities, southwestward from Rutherfordton in North Caro- 
lina, without finding any traces of tin. The usual minerals of the 
5. 
Beitrag zur exakten Geologie; A. von LASAULX. 
pp. 157, with several plates—During the autumn of 1873 the 
