Mountains in New York. | 85 
“The altitudes here given, were deduced from the angular ele- 
vations observed from a point near Lake Champlain, whose ele- 
vation was known, and the distances as determined from the map. 
I mention this to account in part, perhaps, for the discrepancy be- 
tween the results above given and those contained in the geolo- 
gical report as derived from barometrical measurement.” 
Prof. Emmons, State Geologist for the Northern District of 
New York, in his last annual report, in reference to the above, 
has the following : ; oe 
“Ina report to the Legislature this present session, Mr. E. F. 
Johnson, the Engineer of the Ogdensburgh and Champlain rail- 
toad, questions the accuracy of the measurements of Mt. Marcy. 
In reply to his suggestions, I shall merely remark, that it is quite 
doubtful whether the mountain in question is distinguishable 
ftom those of the same group, especially by one who has never 
Visited the interior of this section, and if visible, his measurement 
is not entitled to consideration except as a very imperfect approx- 
imation,”” 
~The observations made by myself were taken, as stated, from 
an elevated point near Lake Champlain. 
The instrument used was of a superior kind, and, graduated, 
8° as to give, with the aid of the nonius, fractions of degrees as 
small as 7$ seconds. On the day when the observations were 
Made it was carefully adjusted. 
Not only the peaks above mentioned, but the elevations of from 
30 to 40 other points were observed, several of which had been 
Previously measured. Among the latter number were the two 
Most elevated peaks of the Green Mountains, Camels Hump and 
Mansfield ; these were found, the former to be 4,220 and the latter 
4,359 feet above tide. = 
hese peaks, as measured barometrically by Capt. A. Partridge, 
(see Gazetteer of Vermont,) were found, the former to be 4,188 
and the latter 4,279 feet above tide; Jess in both cases than the 
Fesults by trigonometrical measurement. The barometrical ele- 
Yations of Mt. Marcy and Whiteface, as given by Mr. Emmons, 
Were on the contrary greater than the trigonometrical ; the former 
PY 687 and the latter by 189 feet; the first being 5,594 and the 
Second 4,855 feet above tide. 
It was this great discrepancy, that induced the remark of dis- 
WUst, as to the entire correctness of Mr. Emmon’s barometrical 
