43i 
the Depth of the Mines in the Hartz, 
A Detail and Calculations of Barometrical Obfervations 
made at the Hartz in October 1776. 
Obfervations in the Mines of Claufthal. 
October 26, 1776, at twenty minutes paft eleven in 
the morning, I obferved my Barometer at the entrance 
of the pit of the mine call ;d Dorothy, and found it (after 
the allowance made for the heat both in this and all the 
following obfervations) 26 in. 4. 1. ~ French meafure. 
Syndic leyser’s Barometer being placed near mine,, 
and obferved every quarter of an hour throughout the 
whole day, fell a quarter of a line, between half and three 
quarters of an hour after twelve, and did not vary fenlibiy 
till four o’clock. It then had a tendency to rife, for it- 
was ftationary, though the Thermometer fell ; fo that, on 
coming 
Defer iption et Calculs des Obfervations du Baronietre faites au Hartz, cn 
October 1776. 
Obfervations dans les Mines de Claufthal. 
Le 26 O&obre, 1776, a 1 1 h. 20 m. du matin, j’obfervai mon baromhre a, 
l’entree du puits de la mine nommee Dorothee; et je le trouvai (la correction 
etant faite pour la chaleur ici, et dans toutes les obfervations fuiv antes) 
26 p. 4I. xg- de France, 
Le barometre le M. le Sindlc leyser etant place aupres du mien, et obferve 
enfuite pendant tout le jour de quart d’heure en quart d’heur , deicendit d’ J de 
ligne de midi \ a midi f ; et ne varia plus lenfiblement juiqu’a 4 heures. Alors 
il tendit a remonter; car il fut ftationaire quoique le thermometre baihait: 
tellement 
