The Hartz. 129 



The result of this assay gave general satisfaction, and is now fol- 

 lowed. The extremely small quantity of mattes produced, and the 

 short space of time employed in extracting the precious metal are 

 sufficient advantages to insure its constant use. 



The works situated at Altenau. 



The village of Altenau is about four miles from Clausthal. The 

 works are situated at a little distance from the village at the head of 

 Ocker vale. The principal foundery has nearly the capacity of that of 

 Andreasberg, and is Hke it, of new construction. The hedps of scoria 

 collected in the vicinity, give an idea of the activity that prevails in 

 the interior. The machines are moved by the waters of the valley, 

 which are employed farther on at Ocker. 



The product of these works surpasses that of the mines of Franck- 

 encharner. The annual product in silver equals 17600 marks, and 

 the business afford besides all the necessaries for the purification of 

 Kupferstein (Shwarts Kupfer). The mines in the environs of Claus- 

 thal chiefly the Dorothea and the Caroline, supply these works with 

 ore. 



(Quantity and richness of the Schlich worked at Altenau. 



The last two quantities of schlich are not the product of any 

 mine in particular. They come from the washing of the poor sands 

 collected from that of the other ores. These poor sands being put 

 aside in the summer, are washed during the winter, and the profits 

 go to the invalid miners. 

 " Vol. XIX.— No. L 17 



