in order to af certain the height of Mountains. 553 
Obfervation at the top of 
the mountain. 
Comparifon of the firjl feries. 
Obfervation at the bottom. 
Barom,N°2. Therm. Therm, 
at the top. attached. detached. 
In. 
2 S - 6 5 33 5 8 -° 56.2 
Barom. N® i. Therm. Therm, 
below. attached, detached, 
Q O 
28.4040 58.1 58.8 
Feet. 
This gives for the height barometrically, 275 5.6 
But the true height was, — 2828.9 
Difference, or error of the barometers, -73.3 
15, 
I OOOO 
Comparifon of the fecond feries. 
Obfervation at the bottom. 
Obfervation at the top of 
the mountain. 
Barom. N° 2 . Therm. Therm. 
Barom. N° i. 
Therm. 
Therm. 
at the top. attached. detached. 
below. 
attached. 
detached. 
In 
In. 
0 
0 
25.6550 56.2 57.O 
28.4040 
5 8 *5 
Feet. 
60.8 
This gives for the height barometrically, 27 54.9 
But the true height was, 
— 
2828.9 
Difference, or error of the barometers, 
-74.0 
""" I0000 f 
4C 
Vol. LXVII. 
Com - 
