. 
Conglomerates with Gneiss, Tulcose Schists, §:c. 387 
silex and some mica, [ations a a sandstone with nearly pure 
this mass, it passes, without an interven- 
n. , . 
In bowlders of this conglomerate found in Northampton, 
Mass., and probably deve from Whately, the most abundant 
pebbles are those of the brown sandstone, considerably meta- 
morphosed and flattened. Those of hornblende schist are com- 
mon. Sometimes they are merely crystalline hornblende, not 
generally laminated however, but mixed with some feldspar, and 
