Am.  Jour.  Pharm. 
May,  1894. 
Calomel  in  Japan. 
239 
ranged  along  the  back  and  front  walls  on  the  hearth,  generally 
raised  at  one  end  by  resting  on  a  lump  of  clay.  In  the  ordinary 
working  of  the  furnace,  as  I  saw  it,  the  heat  from  previous  work 
is  sufficient  to  kindle  the  fresh  wood.  The  flames  rise  up  the  sides 
and  run  over  the  bottoms  of  the  pots,  leaving  the  central  space  in  the 
chamber  free  from  flame.  The  air  enters  by  the  lower  part  of  the 
stoke-hole  and  the  products  of  combustion  escape  invisible  by  its 
upper  part,  so  perfect  is  the  combustion.    At  the  time  of  first  light- 
Fig.  4. 
a.  Tongs  for  lifting  and  dropping  the  lumps  of  wet  compost  into  the  pots. 
b.  Clay  cup  condenser. 
c.  Brass  mercury  spoon. 
d.  Iron  heating  pot. 
e.  Rectangular  iron  bars  for  pots. 
f.  Wooden  core  and  board  for  lining  pots.  '  • 
g.  Bamboo  water  pot  for  wetting  furnace  top. 
h.  Quill  feather  for  emptying  cups. 
i.  Peel  for  lifting  compost  ball  out  of  pot. 
ing  the  fire,  and  of  irregularities  in  stoking,  some  smoke  is  unavoid- 
able, and  to  keep  the  top  and  table  free  from  this  smoke  and  from 
