No. 200. 1 
243 
been also proposed as a name for the group, but the above historical 
fact has induced me to propose the one given above. 
A correct idea of this central group of mountains, or the Adirondacks, 
as we shall hereafter call them, may be gathered from our profile view. 
It is strictly alpine in its essential features, but in fact, when absolute 
height is considered, only so in miniature. It is, however, the only one 
in the State which approaches at all to this character. 
It will be perceived, by inspecting the table ol heights on the next page, 
and comparing them with the measurement of last year, that no less 
than four of the summits exceed that of Whiteface. One of them, viz. 
Mount Marcy, is the peak Mr. Hall and myself pointed out last year as 
the highest point in view from that summit, and as exceeding it also in 
elevation by six hundred feet, as I have this year shown by measure- 
ment. 
The group, taken as a whole, is more lofty than the White Hills of 
New-Hampshire, though the main summit, Mt. Washington, exceeds 
Mount Marcy by 767 feet; for there remain unmeasured many peaks 
which will exceed or come up to 5,000 feet, besides those now given 
in the table. 
It will be interesting to the meteorologist to study the effect and in- 
fluence which this section of high land must have on the mean tempe- 
rature of the surrounding region. It must necessarily reduce it percep- 
tibly over a wide extent of country. This position will be admitted 
more readily when I state the fact, that large banks of snow remain on 
Mount Marcy until the middle of July, or until the 17th, as was observ- 
ed by Mr, Johnson at Clear Pond, this last year; besides we have rea- 
son to believe that ice is formed there every night during the summer. 
I give below the result of a part of the observations on the topogra- 
phy of Essex, selecting those which relate to the height of the most ele- 
vated peaks and highest passes. A part of these results were obtained 
trigonometrical ly, and a part barometrically. I have copied the reduc- 
tion of the barometric observations of Mr. Redfield, as given in Silliman's 
Journal, so far as these observations were made in concert. 
Bulwagga Mountain, 1,260 feet above Lake Champlain. 
East Moriah, Four Corners, 790 do do do 
Pass, or Road Summit, 9 miles from Lake Champlain, 1,546 feet. 
I 
