92 Notice of the Address of T. Sterry Hunt. 
Silurian origin, which are closely like those of his Green Moun- 
in Series. 
tain Se 
10. That he denominates, in like manner, the gneisses, mica 
schists (said to be richer in mica than those of the Green Moun: 
tain Series), hornblendic gneisses and schists, micaceous and clay: 
limestones, existing east of the Connecticut river, as a While 
slates containing andalusite, cyanite, or staurolite, and certain — 
Mountain Series, and makes these a newer “ pre-Cambrian” than — 
the Green Mountain Series :—when there is the same want of — 
stratigraphical evidence as to age as in the former; and when — 
Prof. C Hi 
itchcock’s discoveries of Helderberg corals (Lower 
Devonian, according to Billings, or else upper beds o 
Upper Silurian) at Littleton, not far north of the western ex: 
tremity of the White Mountains, makes it more probable that — 
part of the White Mountain Series of beds are of Helderberg — 
age rather than pre-Silurian; and his discovery of labradorite 
rocks on the southwestern margin of the White Mountains, — 
wholly unlike any of the so-called White Mountain Series 
shows further that a vast amount of study in the field is needed — 
before the dictum of any one respecting the age of New Hamp — 
h. Zh 
shire rocks is worth muc 
When observation has given positive knowledge, we may thet : 
have several ‘“ White Mountain Series. 
2 
: 
fe) 
