Pl.  VI.    Illustration  of  Installation  Employed  for  Collections  Representing 
Metallurgical  Processes. 
The  cut  shows  scheme  for  illustrating  the  blast  furnace  process  for  smelting 
lead  ores.  The  specimens  in  the  lowest  row  are  samples  of  the  ore,  flux  and  fuel 
employed  for  the  charge.  These  are  fed  to  the  blast  furnace  as  indicated  by  the 
lines  converging  to  this  label.  From  this  furnace  are  obtained  the  various  prod- 
ucts represented  by  specimens  at  the  end  of  the  diverging  lines.  Further  treat- 
ment of  the  matte  is  denoted  by  the  line  running  from  it  to  the  label  indicating 
the  matte  blast  furnace.  At  the  end  of  the  lines  diverging  from  this  are  placed 
specimens  of  the  products  obtained  by  treatment  in  this  furnace.  The  individual 
specimen  labels  state  the  composition,  properties,  uses,  etc.,  of  each  substance. 
