J. L. Campbeli— Geology of Virginia. 119 
dent phases. Care would have to be taken to avoid such a 
state of things. 
On the whole, it appears that the suggestion of M. Faye, 
though it was thrown out on the spur of the moment, and was 
not received with very warm approval on every hand, is as 
sound as it is brilliant, and offers some peculiar advantages 
over the existing method of swinging pendulums. 
Feb, 17, 1879. 
Art, XIX.— Geology of Virginia: Continuation of Section across 
the Appalachian Chain; by J. L, CAMPBELL, Washington 
and Lee University. 
In the number of this Journal for July last, a general out- 
line of the geology of the Great Valley of Virginia was given, 
and illustrated by a section embracing the several epochs repre- 
sented in the valley proper, and in the two mountain ranges 
forming its boundaries on the southeast and northwest. That 
section may be regarded as a typical representation of the 
several varieties of rock that come to the surface for many 
miles on both sides of it. 
their appearance in an interesting anticlinal valley at the other 
end of th 
g n. . 7 : * 
It would hardly ie rae to call this an “ideal” section, 
since some of the most interesting portions of it represent real 
* 
