ae ey a a ag See te ai a 
A. Guyot on the Appalachian Mountain System. 173 
The following figures demonstrate the law which I have an- 
nounced above 
Upon the dae which borders the Connecticut ~~ oh the 
east se where the elevation gradually increases fro e sea 
coast until it reaches in Connecticut 1000 feet, in > Mauss 
1100 feet, and in New Hampshire 1600 feet at ‘the sources of the 
Connecticut river, we meet with a series of mountains more or 
less isolated, which appear to have a Pits? tug eg to each other 
than that they are placed on a com 
The most remarkable of these, proceeding from the south to- 
wards the north are the following 
Mount Wachusett, in Massachusetts,  - - 2018 feet high.* 
Grand Monadnock, in mi om Hampshire, > 16. * + 
Moosehilloc oS “eo 
Lafayette Mount, Sionp Oe so 
Mount Washington, 1 White Mountains, - | 6288 “ * 
In the double chain of Green Mountains are the following re- 
percincan peaks gradually increasing in height from the south to 
the north : 
North Beacon, in the Highlands of the Hudson, 1471 feet high. 
Bald Peak, in "Massachusetts, 624* “ “ 
Greylock, or Saddle Mount, in Massachusetts 3505" * Me 
Equinox Mount, in Vermo nt, - - + oot. * 
Killington Peak, - - - 721° x 
Mansfield Mountain, “ - - - - 4430 “ 
North Beacon was prey measured by Capt. Partridge, the 
others were measured by my 
In the Adirondack group T a cited only the most elevated 
point, Mount Tahawus or Mount Marey, which is the only one of 
the great peaks which have as yet measured. I found its height 
5379 feet. This height differs from that of Redfield given in the 
Geology of the State of New York, (5467 feet), and from that of 
Prof. T. Benedict, (6341 feet). But it is to i remarked that 
the heights given by the first are all too great by reason of the 
defective nature of the instrument employed, as I have ere led oc- 
casion to convince myself; and also that Prof. Benedict, although 
provided with a Bunten barometer, was only able to make use 
of Fok observations made at a considerable istance. 
From es awus the height of the peaks diminishes both 
the north and towards the south and the chains dwindle away 
before they reach Lake Champlain or the Mohawk River. 
In the southern part the law of gradual increase is still more 
regular, It can also be exhibited at the exterior base of the 
mountains, along the Great valley, and in the prineipal chains 
* Geodetic points in the triangulation of of Massachusetts. 
Am. Jour. Sci.—Sxconp Series, Vor. XXXI, No. 92.—Maxce, 1861. 
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