Fluid  Extracts  by  Reper eolation.  {A\ty%£7\**m'- 
duced  with  improvement  and  amplification  at  the  end  of  this  paper. 
To  simplify  this  apparatus  with  the  slightest  possible  sacrifice  of  the 
principles  involved,  with  the  object  of  getting  the  principles  to  be 
better  and  more  generally  understood  and  applied  where  so  much 
needed,  is  the  object  of  introducing  the  modified  apparatus  shown  in 
the  following  cut. 
Scale,  one-sixth  of  the  actual  linear  size. 
The  cut  presents  three  separate  groups  of  apparatus  in  positions  to 
illustrate  three  stages  of  repercolation,  and  it  is  to  be  understood  that 
