Geology and Mineralogy of a part of Massachusetts, &c. 55 
or spheroidal masses, with radiations from the centre, and 
the masses often divide by a natural seam into equal por- 
tions. It is sometimes capilla 
Hepatic su\phuret of iron in mica slate, Williamstown. 
In Chester, this mineral yields shanna ig? i Hancock 
the water in iene ing, with th d 
gen, which was suddenly Ss or gore would an ac- 
count for the fact. Mey we not in this way account for 
burnt vegetables or scorched them, near where it issued. 
The place, abounds in sulpburet of iron. Much money 
has formerly been expended in digging for imaginary sil- 
ver ore, in Williamstown, Adams, and Savoy, where noth- 
ing but sulphuret of iron occurred or was to be expected. 
2, MAGNETIC OXIDE OF IRON, 
In mica slate and chlorite slate, and in serpentine, gene- 
rally of the primitive form. It is sometimes massive, weigh- 
ee some pounds. Emmons. Re. at Somerset, with do- 
omite. 
3. SPECULAR OXIDE OF IRON, 
In large folia, cemented with serpentine. The micaceous 
oxide, abundant and beautiful, at Hawley. = ee 
4. BROWN OXIDE OF IRON. 
This is the principal ore of iron at the several beds men- 
ned in the preceding Geol. Sketch. The varieties are 
the Hematitic in all its various forms; the Compact ; and the 
