366 MINES OF CREiMNITZ. 
CHAP, form of a fine powder or sand, to Cremnitz. 
-' ' Here they are exposed to what is called the 
Crude cTudefusion; being simply smelted into a corn- 
Fusion. 
, pound regulus, which is called leek ; consisting 
of all the following metals, besides sulphur,— 
gold, silver, lead, copper, iron, arsenic, bismuth, 
and cobalt. — This is \hQ^rst operation. 
Evapora- ij, Xhc sccoud Operation relates to the treat- 
tion of the *■ 
Sulphur, ment of the lech, or result of the first crude 
fusion. This is exposed to a furnace, the fire 
of which is regulated in the following manner. 
First, there is placed a layer of wood; then a 
layer of charcoal; and, lastly, a layer of the 
lech, broken into pieces. The fuel being 
ignited, the lech is here roasted for the evapo- 
ration of the sulphur. 
Enriched jjj^ A third ODcration is this. After the lech 
I'usion. ' 
has been roasted, they add to it powder of the 
richer ores; and the whole is smelted in another 
furnace. This is called the second fusion, or the 
fusion enriched. 
IV. The result, or regulus, obtained from the 
second fusion, is then carried to another furnace. 
Here it is again smelted, with the addition of 
the richest ores. This third fusion is called the 
