C. H. Hitchcock— Helderberg Rocks in New Hampshire. 469 
often look for exact resemblances in remote localities. Perhaps. 
it is better that the connecting tie be discovered with difficulty,. 
in which ease the conclusions may be more surely established. 
The surroundings at Littleton are different from those at Ber- 
nardston, The series rests upon a chlorite rock + or hard green: 
hydro-mieca schists, close by gneiss, and a whitish soapy schist 
at Littleton. At Bernardston, the underlying as well as the 
overlying rock is quartzite, and in the neighborhood are the seen 
ods 
. . 
and staurolite schists denominated in m y report as the 
This J p. 339. 
+ The “chlorite rock” of this paper may be the same with the diabase found by 
essor tia teks Tew ilatex i hace not had time to review the result of 
analysis of the feldspar. It may contain some lime. 
