in order to ajcet.tain the height of Mountains. 549 
Barometer 
In. L. i6ths. 
22 8 o 
Therm attached. 
de luc’s fcale. 
4 I° + 
Therm. det. 
re a u m. fcale. 
+ IO°« 
And in Englifh meafure and fahren- 
heit’s fcale, — — . . : 
Mr. de saussure’s barometer ordinarily 
ftands higher than mine N* 2. by (9), 
Corredt for the diff. of our attached therm, T, 
24. 1 5 7 a* 
— .0117 
4 26 
56 
Mr. de saussure’s barometer corre died, 24 .H 79 
My barometer ,N° 2, fee the firft feries, 24.1437; — 57 
54 - 2 - 
54 B? 
Difference, — 4 .0042 wholly inconfiderable. 
Our barometers may therefore be faid to have agreed; 
exactly. 
Mr. de saussure made a fecond comparifon juft 
before we left the top of the mountain, which proved as 
follows,. 
- 
Barometer 
Therrm attached. 
Therm. 
In. L. i6ths. 
de Due’s fcale. 
detached. 
22 8 8 
+ 4 ° 
+ iii° 
Or reduced to Englifh meafure and fcale, 24.2014 
Mr. de saussure’s barometer hands 1 __ 
higher than mine N° 2. — J * ‘ 
Corr. for the diff. of our attached therm. 0°.7, — .001B 
6 l.7 
57-9 
Mr. de saussure’s barometer corredted, . 24. 1 879 
My barometer N° 2. fee the lixth feries^. 24,190.0. 
Difference, — - — — 00021 * 
61.O 
57 
So that, in the firft comparifon, his barometer at the 
top of the Mole flood higher than. mine by + ,004 inch 
and in the laft, lower by —,002 ; the mean is higher by 
(q) This we found by comparifons at the bottom, of the mountain. 
4,001 
I 
