464 
VARIETIES. 
reddish  one.  The  quantity  of  acid  used  indicates  the  relative  value  of  the 
ultramarine  as  a  color.  When  smalt  is  present  the  color  is  not  entirely  de- 
stroyed, and  chalk  is  recognizable  by  the  effervescence. — Pharm.  Journal, 
from  Kunth  und  Gewebeblatt  fur  Bay  em,  1853. 
Red  Ink. — C.  Weber  states  that  a  very  good  red  ink  may  be  made  in  the 
following  manner :  Four  ounces  of  Pernambuca  wood  are  boiled  with  six- 
teen ounces  of  dilute  acetic  acid,  and  an  equal  quantity  of  water,  until 
twenty-four  ounces  remain.  An  ounce  of  alum  is  then  added,  and  the  liquid 
evaporated  to  sixteen  ounces,  an  ounce  of  gum  arabic  dissolved  in  it,  the 
whole  strained,  and  a  drachm  of  protochloride  of  tin  added  to  the  cold 
liquid. 
This  ink  possesses  a  very  beautiful  color,  which  is  preferable  to  that  of 
cochineal  ink,  from  the  fact  that  it  is  free  from  the  blue  tint  of  the  latter, 
and  further  because  it  is  more  permanent. — Pharm.  Journal,  from  Allge- 
meine  Pharmaceuiische  Zeitschrift. 
Tannate  of  Quinine. — The  distinguished  German  pharmacologist,  Buch- 
ner,  long  entertained  the  opinion  that  this  preparation  deserved  the  good 
opinion  both  of  physicians  and  of  pharmaceutists.  He  recommended  the 
direct  employment  of  the  cinchona  bark  as  the  readiest  means  of  procuring 
the  tannate  of  quinine.  His  mode  of  preparing  it  was  the  following,  and 
is,  in  fact,  an  extremely  simple  one:  Cinchona  bark,  roughly  powdered,  is 
to  be  treated  with  six  times  its  weight  of  common  or  household  vinegar. 
After  it  has  macerated  during  twenty-four  hours,  it  is  boiled,  then  decanted 
and  the  residue  is  treated  afresh  with  more  vinegar.  These  several  decoc- 
tions are  to  be  mixed  together,  and  filtered  when  perfectly  cold,  and  to  them 
is  to  be  added  an  infusion  of  gall-nuts  so  long  as  a  precipitate  is  formed. 
This  precipitate  is  to  be  collected  on  a  filter,  to  be  then  washed,  and  lastly, 
to  be  carefully  dried.  Although  the  tannate  of  quinine  prepared  in  this 
manner  is  not  absolutely  pure,  and  therefore  requires  to  be  given  in  larger 
doses  than  the  sulphate  of  quinine,  yetBuchner  considered  this  preparation 
as  particularly  to  be  recommended,  both  on  account  of  its  cheapness  in 
comparison  with  the  more  expensive  drug,  sulphate  of  quinine,  and  also 
from  the  simplicity  of  its  manufacture,  on  account  of  the  facility  with  which 
it  may  be  prepared  in  almost  all  pharmaceutical  establishments. — Annals 
of  Pharmacy,  June,  1853. 
Means  of  preserving  Paper  Labels.  By  G.  L.  Ulex. — The  labels  upon 
vessels  kept  in  damp  cellars  soon  become  obliterated  in  consequence  of  the 
paste  becoming  mouldy  and  the  growth  of  a  fungoid  vegetation,  which  is 
at  first  sporadic,  but  gradually  covers  the  entire  label.  If,  however,  a  trace 
of  the  oxide  of  mercury  is  mixed  with  the  paste,  and  the  labels  themselves 
are  dipped  into  a  very  weak  alcoholic  solution  of  bichloride  of  mercury, 
their  destruction  in  this  way  is  completely  prevented. — Pharm.  Journal, 
from  Archiv  der  Pharmacie,  Jan.  1853. 
