in order to ajcertam the height of Mountains. 553 
feiies gives for the error on 1000 feet, 26.8. I think I 
have now fhewn, that the error actually exifts; it re- 
mains that we determine precifely the quantity of it. 
For this purpofe it will be proper to colled! all the pre- 
ceding observations in one point of view. 
Table of the refult of all the barometrical experiments, 
Place of obfervation. 
Mont Saleve, 
At the Mole, <{ 
Mont Saleve, 
r 1 
True height 
irigonometri- 
caily. 
2331.3 
4211. 3 
2828. 
Height by 
the barome- 
ters. 
2775.2 
276-5.2 
2 7 S 9 4 
4132.7 
4140.1 
41 IS' 1 
4111.9 
4 ii 3-7 
4104.9 
2 75 S- 6 
2754-9 
2748.9 
2752.8 
Mean 
heat. 
69.4 
68.5 
67.2 
58- 3 
58.9 
59 - 5 
60.0 
60.5 
60.3 
57*5 
58.9 
59- 6 
59-8 
Error in 
feet. 
— 5 6 - 1 
— 68.1 
— 7 1 -9 
— 78.6 
— 71.2 
— 96.2 
— 99*4 
— 97 - 6 
I06. I 
— 73-3 
— 74-o 
— 80.0 
— 76.1 
Error in 
1000 feet. 
— 19.8 
24.O 
—25.4 
— 18,6 
— 16.9 
—22.8 
—23.5 
—23,1 
—25.2 
-^25.9 
— 26 2 
— 28.2 
— 26.9 
Mean error in 
1000 feet. 
} - 2 - 1 
7 — 21-7 
—26.8 
Mean of all, 23.6, and the temperature 61°. 4. 
The Mole, from two ob- 
fervations of Mr. de 
saussure, — 
The fame by Mr. de 
•saussure, and Mr. de 
euc, at Geneva, 
According to Mr. the Mole, 
obfervation s, fee 
DE LUC’S own 1 the Dole, 
Recherches 
i’Atmofpher 
fur } Buet, 
M c Blanc, 
4211. 3 
— 
92 . 
— 21.8 
4S83. 
4814. 
— 
— 69. 
— J- 4 * 
* 
4882.8 
4860. 
— 
— 22.8 
— •47 
4292.7 
4210. 
— - 
— .82.7. 
— 19-5 
8893.6 
8770. 
— * 
—123 7 
— J 3 9 
I 14432-5 
14093. 
— 
—33 93 
-23.5 
16.2 
The 
4 C 2 
