The part of the mountain range lying west of the Brocken described in a geographical sense as the Upper Harz is divided from a miner's and ironworker's perspective into the Upper Harz (Oberharz), i.e. the plateau of Clausthal, with this town and Zellerfeld and the mining towns of Altenau, Lautenthal, Wildemann, Grund and Andreasberg, and the communion of the Lower Harz, i.e. the Rammelsberg near Goslar and the ironworks that process its ore, and which lie on the northern foothills of the mountains near Ocker, Langelsheim etc. […] The actual Upper Harz, now part of the Prussian state and forming the district (Bezirk) of the Clausthal Mining Department, is that region west of the Bruchberge with mineral lodes in Devonian and Carboniferous mountains, which are divided into specific groups or seams.