294 
TINCTURA  CINCHONJE  FERRATA. 
The  object  of  the  glycerin  is  to  retard  evaporation  after  application 
to  the  skin,  and  the  oiled  silk  is  also  used  with  this  view.  This 
preparation  is  twice  the  strength  of  the  root,  and  is  exceedingly 
active.  It  should  not  be  applied  to  an  abraded  surface,  and  in 
its  use  the  patient  should  be  cautioned  in  relation  to  its  poisonous 
nature,  and  avoid  bringing  it  in  contact  with  the  eyes,  nostrils, 
or  lips. 
EXTRACT  OF  LUPULIN. 
By  W.  W.  D.  Livermore. 
Lupulin  procured  by  the  usual  method  of  sifting  is  necessarily 
more  or  less  mixed  with  powdered  hops,  and  of  course  varies  in 
activity.  The  object  in  proposing  an  extract  is  to  present  a  pre- 
paration containing  the  medicinal  principles  of  hops  unimpaired, 
of  uniform  strength,  and  in  a  form  convenient  for  pills.  The  pro- 
cess of  preparation  is  as  follows  : 
jfc     Lupulin  (commercial)  !fiv. 
Alcohol  fgviij. 
Mix  in  a  percolator  and  allow  to  stand  an  hour.  Then  displace 
with  alcohol  until  two  pints  of  filtered  liquor  are  obtained.  Pour 
this  liquor  into  a  shallow  dish  and  set  a  side  to  evaporate  sponta- 
neously. 
In  making  larger  quantities  of  extract  it  saves  expense  to  distil 
off  three-fourths  of  the  alcohol  previous  to  exposing  the  tincture  to 
evaporation. 
Lupulin  thus  prepared  possesses  the  active  properties  of  hops 
in  an  eminent  degree,  and  is  in  a  convenient  form  for  prescrip- 
tion— 5j.  of  commercial  lupulin  yields  upon  an  average  Bij.  of  jthe 
prepared  article. 
TtNCTURA  CINCHONA  FERRATA. 
By  Alfred  B.  Taylor. 
A  preparation  bearing  this  name  has  recently  been  introduced 
and  prescribed  to  a  considerable  extent,  which,  from  its  name, 
promises  more  than  from  a  critical  examination  of  its  properties 
it  would  seem  to  be  entitled. 
It  was  originally  prepared  at  the  suggestion  of  Dr.  J.  F.  Meigs, 
