252 Notice of a curious Water-Fall, &c. 
Art. VI.—Notice of a curious Water-Fall, and of Excava- 
tions in the Rocks. By Professor Haun. 
To the Editor. 
miles from the tavern he crosses a rivulet, a little above 
where it empties into the former stream. He advances a 
few rods farther, and meets another. It comes from the 
north, and is called by the mountaineers, the North Branch, 
A little more than a quarter of a mile from the turnpike, Up _ 
this stream, is an object which merits the attention of the 
curious.’ I have recently, been in company with the Rev. 
Professor Keith of William and Mary College, Virginia, 10 
examine it. =~ oS 
There is-a road cut, but not much travelled, along the 
western side of the North Branch, at a small distance from 
the stream. From the road the water is seldom visible, be- 
ing concealed by a thicket of evergreens, and, in some pla- 
ces, by the banks which intercept the view of it. Its noise 
may be distinctly heard. 
The better to accomplish our object, we proceeded up 
this road nearly halfa mile, which brought us to the head of 
a succession of the most singular and interesting rapids that 
Teversaw. Here the student of nature would stand aston- 
ished to see how great effects have been produced by a0 
apparently trivial cause: 7 
At the northern extremity of the rapids, the ledge over 
which the water passes, is a variety of common chlotite 
rock, of a very dark brownish green color, containing veins of 
milky and greasy quartz. I have never before seen chlorite n 
such large masses. The fracture in one direction is eX- 
tremely uneven. It may be scratched easily with the fin- 
ger-nail. It is composed of minute scales, which are some- 
