THE 
AMERICAN  JOURNAL  OF  PHARMACY. 
SEPTEMBER,    187  4. 
WISTAR'S  LOZENGES. 
By  Franklin  C.  Hill. 
Until  1856  the  manufacture  of  cylindrical  lozenges  of  licorice,  gum 
and  sugar  was  a  matter  of  such  difficulty  that  few  attempted  it  on  a 
large  scale,  and  the  best  article  then  produced  was  so  badly  made 
that  it  would  be  unsalable  at  this  time. 
The  change  that  has  come  over  this  manufacture  is  due,  apparently, 
to  the  machine  and  processes  introduced  by  me.  The  machine  is  re- 
presented in  the  cut  here  given.  The  best  material  is  black  walnut, 
well  seasoned,  for  the  machine,  and  pine  or  poplar  for  the  drying 
board,  which,  by  the  way,  should  be  just  long  enough  to  slide  in  under 
"  the  board."  There  are  two  springs  under  the  board,  that  catch  in 
the  notches  in  the  ends  of  the  drying-board,  and  prevent  its  return  after 
it  is  pushed  forward.  The  whole  upper  surface  of  the  drying-board 
is  cut  with  a  proper  plane  into  shallow  grooves,  about  three-eighths 
of  an  inch  wide  and  one-sixteenth  deep.  The  springs  must  be  so 
placed  as  to  bring  a  groove  under  the  opening  between  board  and 
guard. 
The  knives  of  the  roller  are  made  of  sheet  brass  let  into  saw  kerfs 
cut  across  the  wood,  and  the  upper  edges  are  made  smooth  and  true. 
Each  drying-board,  of  one  foot  width,  will  hold  about  two  pounds  of 
lozenges. 
Oil  the  whole  machine,  when  new,  with  olive  oil.  It  is  convenient 
to  have  another  cutter,  with  knives  placed  say  two  inches  apart,  and 
standing  one-half  inch  high. 
Having  mixed  a  mass  of  about  one  pound  weight,  roll  it  quickly 
with  the  second  roller,  and  cut  it  into  the  right  number  of  pieces. 
Then  roll  each  piece  to  the  full  length  of  the  board  within  the  end 
cleets,  mark  it  with  the  knife  deeply,  but  take  care  not  to  cut  it 
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