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AN  AUTOMATIC  PHARMACEUTICAL  STILL. 
AN  AUTOMATIC  PHARMACEUTICAL  STILL. 
By  A.  F.  W.  Neynaber. 
Fig.  1.  A,  Shows  the  outer  boiler. 
B,  "       "   inner  boiler. 
C,  "       "  dome. 
D,  "       "   steam  conducting  pipe. 
E,  "       "  condenser. 
F,  "       u  refrigerator. 
The  outer  boiler  A  is  connected  by  means  of  the  pipe  a,  b, 
and  c  with  the  feeder  G,  consisting  of  a  suitable  bottle  of  about 
one  gallon  capacity.  The  pipe  b  is  so  arranged  that  the  water 
in  the  outer  boiler  will  be  at  d.  As  soon  as  the  surface  of  the 
water  in  A  falls  below  the  extremity  of  the  pipe  b,  air  entering 
through  e  will  pass  through  the  pipe  b  into  the  bottle  G,  and  a 
corresponding  portion  of  water  will  descend  into  the  boiler  A, 
and  so  a  continuous  supply  of  water  will  be  kept  up  in  the 
boiler  A  until  the  bottle  G  is  empty,  /,/are  cast-iron  rings, 
which,  by  means  of  screws,  press  the  rims  of  A  and  B,  and  the 
dome  C,  having  rings  of  India-rubber  between  them,  together, 
so  as  to  form  a  steam-tight  joint.    As  soon  as  the  generation  of 
