the Depth of the Mines in the Hartz. 421 
We carried this project into execution on the 30th of 
October, when I found the following heights by the 
calculations hereunto annexed- 
French toifes,. 
Height of the entry of the mine, called Alte" 
Seegen, above a certain point in the valley > 102,18 
of Bremeke, 
Height of the entry of the fame mine, above' 
another point near Lasfelde, in the valley * 173,81 
of Olierode, 
After I had calculated thefe obfervations, Mr. rausch 
was fo good as to give me a profile of our rout, on which 
the points above mentioned were marked. Their heights, 
reduced to French toifes, are as follow : 
The 
Nous executames ce projet le 30 O&obre; et je trouvai les hauteurs fuivantee 
par les calculs ci joints de nies obfervations, 
Toifes de Fr e 
Hauteur de l’entree de famine, nominee Alte Seegen, au delfus d’unT IQ2 
certain point dans la vallee de Bremeke, J 
Hauteur de la meme entree de mine, au delfus d’un autre point presl m 
de Lasfelde, dans la vallee d’Ofterode, J 
Apres que j’eus calcule ces obfervations, M. rausch eut la bonte de me 
donner un profil de la route que nous venions de faire, ou les points ci-delfus 
etoient marques. Leur hauteur, reduite en Toifes de France, eft comme fuit^ 
Le 
