the Depth of the Mines in the Hartz. 
44 * 
Obfervations at two Points geometrically determined on 
the outjide of the Mountain , relatively to the Mine of 
Alte Seegen. 
On the 30th of October, at 10 in the 
morning, I obferved the barometer under the 
cover of the mine called Alte Seegen near 
Zellerfelt, and found it at — — j 
At half an hour paft feven at night, at my 1 
In. 
>21 71 2 
return from thefe obfervations, it was at 
j-2 6 6 8 
Confequently in nine hours and a half the barometer 
fell j|ths of a line ; and by obfervations made by Syndic 
Leyser, this fall was gradual. 
At 
Obfervations en deux Points dete mines geometriquement a F cxtericur de la Mon - 
iagne , relativement a la Mine d’Alte-Seegen. 
Le 30 Oftobre, a io h. du matin, j’obfervai le barometre fous 1 cm P. L. 
convert de la mine nominee Alte Seegen, iituee pres de Zellerfeld, ew 27 71 2 
je le trouvai a — — — — ' 
A 7 1 h. du foir, au retour des obfervations ci apres, il fe trouva a 26 6 8 
Ainfi en 9§ h. le barometre baiffa de if de ligne. Et par des' obfervations 
faites d’heure enheure par M. le Sindic leyser, cet abbaiffement fut gra.dueK 
im< 
Vol. LXVII, 
M m m 
