The following table contains the results of the essays, made upon this product, in the furnace termed 



Manche, at Lautenthal. 



*- 



1 st essay. 



2d 



tt 



3d 



14 



1th 



(4 



5th 



14 



feth 



14 



Mixtures. 



Tiine.lGraupen. Scoria. 





qts. 



hours. 



20 



~~39 _ 



20 



39 



19 



39 



21 



39 



20 



39 



23 



39 



qts. 



Cupel 

 scoria, bottoms. 



qts 



21 

 21 

 21 

 21 

 21 

 21 



qts. 



a 

 o 



s-. 



qts 



Lime 

 stone. 



qts 



Products. 



These products contain per quintal. 



4**- 



24 



24 

 24 

 24 

 24 

 30 



6 



G 



6 



6 





f 



qt 



s. 



4> 



i MM 



o 



qts. qts. 



5 



a 

 o 



Oh 



Q 



qts. 



. I Mattes. 



CC 



o 



0) a 



lots. 



Lead. 



Silver, 



Scoria. 



Lead. 



lbs. 



lots. 



IT 



2 



2 

 2 

 2# 



2^ 



*4 



lbs. 



Silver. 



lots. 



Deposits. 





Lead. 



4 

 3 

 4 





 4 



traces. 

 JL 



1 6 



I 



TV 



lbs, 



1(5 



16 



16 

 16 

 16 



16 



Silver. 



lots. 

 1 



4 



J_ 

 4 



k 1 

 4 



1 

 4 



i 1 

 ! 4 



[ 4 



Combustible. 



Coke. Charcoal. 



)al^en 



52 



(50 

 (52 

 50 

 54 



78 



maas. 



8 



8 

 8 

 8 

 8 

 8 



Lautenthal. 



These works are vast, and possess the materials for the treatment of copper pyrites, and the copper mattes 



m. a m . * «i« si wr*i i 



Wild 



(Kupferstein). They are situated in the picturesque valley of Lautenthal, near the mines and village ol 



distant about three leagues from Clausthal. The magnificent reservoirs of the Boxwise are seen about half the 



distance between the two places. 



S 



55 



M 



03 



• - 



