444  American  Pharmaceutical  Association.  {As™ptimbef,hi9o™ 
This  apparatus  is,  of  course,  applicable  to  the  making  of  a  number 
of  solutions,  particularly  of  such  chemicals  as  are  deteriorated  by- 
organic  matter  or  are  not  readily  soluble. 
Circulatory  Displacement  as  a  Pharmaceutical  Process. 
By  Frank  E.  Fisk. 
The  author  employs^  cylindrical  displacement  jars,  preferably  of 
clear  glass,  and  capacity  varying  from  250  to  2,000  c.c,  each  of 
which  is  provided  with  a  moderately  short,  slightly  tapered  cork  of 
good  quality,  through  the  center  of  which,  from  its  under  surface, 
should  pass  an  ordinary  screw-eye  of  such  length  as  to  pass  through 
the  cork  and  project  above  same  from  one-half  to  one  centimetre.  To 
their  thread  ends  next  attach  a  turned  wood  handle  of  inverted  pear 
or  other  convenient  or  suitable  shape,  to  facilitate  the  removal  of  the 
cork.  To  each  jar  should  next  be  attached  a  strip  of  ordinary 
white  paper  of  good  quality  extending  from  the  bottom  perpendicu- 
larly toward  the  top.  Next  weigh  accurately  each  jar  and  note  the 
result  in  grammes  on  margin  of  label  (representing  the  tare  of  same), 
and  proceed  to  graduate  the  jar  by  carefully  weighing  and  measur- 
ing, indicating  by  means  of  long  and  short,  heavy  and  light  lines, 
the  liters  and  grammes  and  divisions  and  multiples  of  same,  and 
then  coat  surface  of  label  with  collodion  to  prevent  erasure,  and 
having  provided  each  with  several  cylindrical  shaped  bags  of  muslin, 
gauze,  bolting  cloth,  flannel,  etc.,  of  suitable  diameters  and  of 
varying  capacities,  with  strinqs  of  sufficient  length  to  allow  of  their 
complete  immersion  in  the  liquid  after  closing  the  same,  the  utensils 
are  complete. 
The  following  are  some  of  the  preparations  that  may  be  con- 
veniently and  economically  made  by  circulatory  displacement.  Prom- 
inent among  these  may  be  mentioned  Mucilago  Acaciae  U.  S.,  the  gran- 
ular or  coarsely  comminuted  drug  being  conveniently  washed  as 
required  by  the  Pharmacopoeia  in  the  gauze  bag,  placed  in  the  jar  pro- 
vided with  the  proper  quantity  of  water,  and  after  the  requisite  length 
of  time,  the  removal  and  spiral  twisting  of  the  bag,  the  mucilage  is 
finished  in  a  cleanly  manner,  with  economy  of  time  and  labor. 
Syrupus  Allii,  Syrupus  Althaeea,  and  many  others  of  the  list  of 
syrups  may  with  equal  propriety  be  thus  prepared,  while  as  a  matter 
of  fact  there  is  scarcely  a  class  of  galenical  liquids  which  does  not 
contain  one  or  more  preparations  that  may  be  advantageously  made 
