378 J. D. Dana on Serpentine Pseudomorphs 
at Fahlun in Sweden. But the crystalline masses of this 
orthorhombic mineral are made up usually of tabular cleavable 
masses, and never have the perfect cubic regularity of divis- 
ional planes found in these pseudomorphs. 
dolomite, and the rest subsequently to serpentine? Or, was 
the whole mass first changed to dolomite, and afterward a part 
‘oe showing that it is a common met 
he 
