502 Mr. de luc on Barometrical Obfervations 
Barometrical Obfervations in the Deep St. John, 
July the $tb, 1778. 
Time. Bar. corrected Therm, in 
by its therm. the air. 
h ' Inches. 
At the ent. of the mine, 4 50 night 26.6224 - 5 
2 5 night 26.6276 - 77 
The mean, 
- 
26.62 5 
“ 6? 
At the George Gallery, 5 
50 night 
27.4167 
-17 
8 
1 5 night 
27.4271 
-17 
The mean, 
- 
27.4219 
-17 
At the level of the 1 i^G. 7 
30 night 
27.9792 
- 8 
Calculation 
Obfervations larometriques au Profond St. Jean, le 5 e Juillet, 1778. 
Bar. corrige par 
fon therm. 
Therm, dans 
Pair* 
h ' 
A Tentree de la mine* 4 50 foil* 
P, L. 
26.7J-.!- 
3 
9 5 foir 
26.7,-n 
- 7 f 
Termemoye 
n, 26.7A 
- 6i 
A la galerie George, 5 50 foir 
27-5 
-17 
8 15 foir 
27 - 5 A 
-17 
Terme moyen, 27 .5^ 
An niveau de I’onzieme gal. 7 30 loir 
27. i iif 
* 8 
Calcvt 
