434 M. de luc’s Barometrical Qbfer nations on 
In. L. 1 6th of Lines. Log. 
At 3 LI 1 . at a foot and! 
a half from the bot- 
tom of the laft ladder 
of the Caroline, - j 
At the top of the pit 
of the Dorothy 
4 13= 5 26 i 37210,683 
the pit l , 
J 26 3 13 = 5053 37035*493 
Difference, — — 175,190 
In the pit of this mine my thermometer 
flood at -11 of the fcale for the dilatations 
of the air. But the outfide thermometer being :• 4,455' 
then at — 23 L, I reckon the mean temperature 
at — 1 3 , and confequently I dedudt 
The bottom of the pit of the Caroline 
below the entrance of the pit of the Doro- 
170,735 
At 
P. L. i6deLig. 
A q§ h. a pied du bas de la dern. echelle ] , 
de la Caroline, - _ ] 2 7 4 *3 = 52^1 
Au haut du puits de la Dorothe'e, — 26 3 13 = 5053 
Log. 
37210,683 
37 ° 35?493 
Difference, — — — 
Dans le puit&de cette mine, men thermometre fe tenoit a — 11 
de rechelle pour les dilatations de fair. Mais le thermometre etant 
alors au dehors a — 23I, j’eflime la temperature moyenne a — 13. 
Et confequemment je deduis — 
175 ^ 9 ° 
4 ? 45 5 
Le fond du puits de la Caroline au deiTous de l’entree du puits de 1 . m 
laDorothee, — — — — 1 / * 1 °>? 3 S 
3 
A 6 h # 
