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West Moriah, at Weatberheads, or Schroon Yalley, 1,117 feet. 
Pass of the Schroon Mountain, 1,375 feet. 
Johnson^s, at Clear Pond, 2,012 feet. 
Pass between Johnson's and Mclntyre, 2,592 feet„ 
Boreas River Bridge, 2,026 feet, 
Hudson River Bridge, 1,810 do 
Inlet at Lake Sandford, 1,826 do 
Iron w^orks at Mclntyre, 1,889 do 
Lake Henderson outlet, 1,936 do 
Lake Golden, 2,851 do 
Avalanche Lake, about 2,900 do 
Highest source of the Hudson and Ausable Rivers, 4,747 feet. 
Mount Marcy, 5,467 feet. 
Mount Mclntyre, 5,183 feet. 
Summit of the pass between Lake Henderson and Preston Ponds, one 
of the sources of the Racket river, 2,223 feet. These ponds are about 
four miles east of Mclntyre, and are only 150 or 200 feet below the 
pass. 
Bald Peak, in West Port, 2,065 feet. 
Dix's Peak,* 5,200 feet. Approximation by levelling. 
Dial Mountain jt 4,900 feet. Approximation by levelling. 
Height of the barometer at Johnson's, August 29, 2 P. M. 28 in. 
temp. 71° F. At the Notch, in Keene, 100 feet below the pass at the 
base of Dial Mountain, barometer 27 in. temp. 50°, 5 o'clock P. M. 
August 30. This last observation was made near the source of the 
Schroon river, leaving out that portion which flows from near the sum- 
mit of the mountain. 
The height of the pass between the Schroon and Ausable, 2,756 feet, 
adding 100 feet for the rise above the point where the observations were 
taken, t 
• Highest peak of the Schroon range west of Weatherheads. 
t Known under the name of Nipple top at Johnson's. It is probably within the bounds of 
Keene, and is there called the Noon mark. 
X The barometric observations were calculated by Mr. Redfield, by the formula and tables of 
M. Oltmanns, as given by De La Beche in the appendix to the Geological Manual. As I used 
a differen;, formula last year, I have compared the result as obtained by Mr. Oltmanns with 
this. I find a material difference, and, taking all circumstances into consideration, I believe the 
formula I use more accurate than the other. The formula is as follows : 
