Notices on the Harlz, hy M. be Bonnard, 

 Ingenieur en chef of the Royal Mining Corps. 



(Annales des Mines, 1822.) 



1. Physical Sketch of the Hariz. 



If the Hartz is geologically considered, the formations of 

 which it is composed may be regarded as belonging to the 

 great schistose zone, which extends from W.S.W to E.N.E., 

 from the north of France across the north of Germany j but 

 the continuity of this zone suffers, at least on the surface, 

 considerable interruption in Westphalia, and the Hartz forms 

 in every respect a group of isolated mountains in the midst 

 of rocks of more modern formation. This group is elon- 

 gated from N.W. to S.E. ; its greatest length is about 22 

 leagues, from Seesen to Friederich'srode, and its breadth 

 8 leagues, between Wernigerode and Walkenried. The 

 Brocken, the highest summit of the Hartz and of the whole 

 north of Germany, is, from the barometrical observations of 

 M. de Villefosse, 1132 metres [3713 feet, 6 inches] above 

 the level of the Baltic sea. The slope of the Hartz moun- 

 tains, which is rapid on the north, is in general gentle to- 

 wards the south, and especially the south-east. 



Many small chains, oi branches of mountains, generally 

 more elevated than the others, quit the Brocken as a centre, 

 and diverge in different directions through the Hartz. We 

 should principally remark those two which divide the waters 

 and which extend one to the N.E., the other to the south of 

 the Brocken. On the east of this crest, the waters flow to 

 the Elbe by several small rivers, the most considerable 

 of which is the Bode ; on the west, the waters flow towards 



