260      Formulas  from  Pharrnacopcea  Germanica.  { A i™ 
and  by  oxalate  of  ammonium — this  proving  it  to  be  identi- 
cal with  No.  3. 
The  cream  of  tartar  was  adulterated  with  about  five  to  six  per  cent, 
of  tartrate  of  calcium,  eight  per  cent,  sulphate  of  aluminum  and 
ammonium,  and  two  per  cent,  of  starch. 
Pottsville,  Pa.,  April,  1873. 
ON  NON-GELATINIZING  TINCTURE  OF  KINO. 
Editor  American  Journal  of  Pharmacy  : 
The  gelatinization  of  tincture  of  kino  is  a  universal  annoyance 
among  pharmacists,  and  to  make  this  tincture  so  that  it  would  not 
lose  its  astringent  properties,  or,  on  long  standing,  gelatinize,  is 
quite  a  desideratum.  I  here  supply  you  with  a  formula  that  has 
been  well  tried  and  has  proven  good. 
Take  of 
Kino  in  moderately  coarse  powder, 
Pry  sand,    .  .  .  .  aa  ^iss. 
Carbonate  magnesia,      ....  sj. 
Rub  in  a  mortar  and  saturate  with  diluted  alcohol  for  one  hour  ;  then 
percolate  by  pouring  one  and  a  half  pints  diluted  alcohol  on  the  mass  ; 
when  one  pint  of  tincture  is  obtained,  filter  and  cork  tightly. 
L.  Myers  Connor. 
Dallas,  Texas,  May,  1873. 
[Note  by  the  Editor. — It  is  possible  that  the  pectinacious  matter 
is  entirely  removed  by  using  carbonate  of  magnesium,  as  suggested 
by  our  correspondent  ;  but  is  the  kinotannic  acid  not  likewise  re- 
moved by  the  same  agent,  cither  wholly  or  in  part  ?  At  a  boiling 
temperature,  at  least,  according  to  Gerding,  the  whole  of  this  tannin 
is  precipitated  by  carbonate  of  magnesium,  while  the  liquid  still  retains 
a  deep  red  color.] 
SELECTED  FORMULAS  FROM  PHARMACOPCEA  GERMANICA. 
By  the  Editor. 
(Continued  from  page  221  of  last  number.) 
£(^6  terebinthinatus,  s.  Balsamum  vita?  externum.   Powdered  Cas- 
tile soap,  oil  of  turpentine,  of  each  6  p. ;  purified  carbonate  of  potas- 
sium, 1  part.   Beat  them  together  into  a  uniform  mass  of  the  consist- 
ence of  an  ointment. 
