Exploring Visits to the Sources of the Hudson. 319 
west extension of Mount McIntyre on the other, into the bottom of 
this natural gulf. Some of these blocks are set on end, of a height 
of more than seventy feet, in the moss-covered tops and crevices of 
which, large trees have taken root, and now shoot their lofty stems 
high above the toppling foundation. The north branch of the 
Hudson, which passes through Lakes Henderson and Sanford, takes 
its rise in this pass, about five miles from McIntyre, and the eleva- 
tion of its source, as would appear from the observations taken by 
Prof. Emmons last year, is not far from three thousand feet above 
tide. : ; 
Following the course of the valley, under a most copious fall of 
rain, we descended to Lake Henderson, which is a fine sheet of 
water of two or three miles in length, with the high mountain of 
Santanoni rising from its borders, on the west and southwest. It is 
not many months since our woodsman, Cheney, with no other means 
of offense than his axe and pistol, followed and killed a large pan- 
ther, on the western borders of this lake. Pursuing our course 
along the eastern margin of this lake, we arrived at the settlement 
about 3 P. M., having been absent on our forest excursion seven 
days. 
Elevation of the Mountain Region. 
The following table of observations, as also the preceding one, is 
calculated according to the formula given by Bowditch in his Navi- 
gator, except for the two principal mountain peaks, which are cal- 
culated by the formula and tables of M. Oltmanns, as found in the 
appendix to the Geological Manual of De la Beche, Philadelphia 
edition. For the points near Lake Champlain, the height is de- 
duced from the observations made at the lake shore, instead of those 
at Albany, adding ninety feet for the height of Lake Champlain above 
tide. ‘The barometrical observations made at Syracuse, N. Y., at 
the same periods, by V. W. Smith, Esq., (with a well adjusted ba- 
rometer, which has been compared with those of the writer,) would 
give to the High Peak an elevation of five thousand five hundred 
and ten feet. ‘The observations at Albany have been taken for the 
lower station, because the latter place is less distant, and more nearly 
on the same meridian. Perhaps the mean of the two results may 
with propriety be adopted. In most of the other cases, the results 
deduced from the observations at Albany agree very nearly with the 
results obtained from the observations made at Syracuse, 
