Exploring Visits to the Sources of the Hudson. 311 
in the field, and it is possible that this hygrometric depression may 
have slightly affected some of the observations which here follow. 
Upper sta- Bik 
tion.—Ba-|Lower sta-} 2.2 
di rom. cor-/tion.—60 | sos 
eel) 1-50}feet above} @ 2 
cages or varia-|tide at Al-| So 
Date. Place of observation. Hour. tion Of tis-|bany. 3 3 
tern. = <= 
Att.) Ba- |Att) Ba- | £2 
Th. rom. |Th.| rom. | © 
July 29, 29, Lake Champlain at White Hall, - - 9 A. M.| 72°] 29.91] - 2 90 
fe Summit of Skeenes’ Mountain at Do." : 8.40 “ | 71 | 29.39] - - 588 
i Lake Champlain at Port Henry,- -  - 5 P. M.| 73 | 29.91 
= East Moriah, Four Corners, t ERE Were 5.45 “ | 71 | 29.09 : 880 
July 31, | Road summit, 9 miles from Lake Champlain, {10.45 a. m.| 71 | 28.42 | 72°) 29.94 }1.546 
sf West Moriah, at Weatherhead’s,Schreon valley, 1.15 P. M. 75 | 28.86 | 7. Foe Pally, 
is Road summit, pass of Schroon Mountain, 4 69 | 28.57 | 73 | 29.93 | 1.875 
3 Johnson’s, at Clear Pond ay oe ines 5150) 2) 67 SFOShaTe « 12.012 
Aug. 1, Do. Do. Second observation,t [6.20 a.m.| 62 | 28 03} 70 | 30.04 | 1.991 
if Road summit, ridge west of Johnson’s, 8 6 | 64 | 27.45] 71 & 12.592 
x Boreas River ‘bridge, - - - - 9.45 “ | 69 | 28.01 | 73 | 30.02 |2.026 
cs Hudson River bridge, sabi lhe’ Salen 
Se Lake Sanford inlet, - - : 
<6 Tron Works at McInfyre,_ - : 
ae Lake Henderson outlet, : - 
- {12.30 p. at] 78 | 28.19 
Lake Champlain is about ninety feet above tide water. 
It appears from the above that the two principal depressions in 
the section of country over which this road passes, west of the 
Schroon valley, is in one case two thousand and in the other eigh- 
teen hundred feet in elevation. 
Second Expedition to the Mountains. 
We left the settlement on the 3d of August, with five woodsmen 
as assistants, to take forward our provisions and other necessaries, 
and commenced our ascent to the higher region in a northeasterly 
direction, by the rout on which we returned last year. We reached 
our old camp at Lake Colden at 5 P. M. where we prepared our 
quarters for the night. The mountain peak which rises on the east- 
ern side of this lake and separates it from the upper valley of the 
main stream of the Hudson, has received the name of Mount Mc- 
Martin, in honor of one now deceased, who led the party of last 
year, and whose spirit of enterprise and persevering labors contrib- 
uted to establishing the settlement at the great Ore Beds, as well 
as other improvements advantageous to this section of the state. 
* Four hundred and ninety eight feet above Lake Champlain. 
+ Seven hundred and ninety feet above ‘do. 
+ Mean of the two setts of observations two thousand feet, nearly. 
