504 Afr. de luc on Barometrical Observations , 8 cc 
Calculation of the Depth of the 1 1 th gallery. 
Barometer at the gallery, 
At the entrance of the mines. 
Heat of the air at the gallery, 
At the entrance of the mine, 
27.9792 = 5372 Log. 37301360 
26.6250 ~ 5112 37°85908 
Difference 215452 
- 6 i 
— J 4i = to deduft 3070 
iooodths of a French fathom, 212382 
zt to add, - - 3482 
Lachters 215.864 
Calcul de la frofondeur de Fonzteme galerie . 
Bar. a la galerie, - 
27.11112:5372 Log. 
37301360 
A l’entreede la mine - 
26. 7tV = 5 112 
37085908 
Difference 
2I 545 2 
Chaleur de Fair a la gal. 
- 8 
A 1’entree de la mine, 
- 6| 
“ H? = 7^ a deduire 
3070 
iooo me de toife de France, 
212382 
<n- a ajouter. 
3482 
Lachters 
215,864 
