Am.  Jour.  Pharm.  > 
Oct.  1,  1872.  / 
Bromide  of  Quinia,  etc. 
449 
presence  of  baryta  in  the  solution  was  not  indicated,  slightly  acidulate 
another  portion  of  the  filtrate  with  nitric  acid,  and  add  a  drop  or  two 
of  solution  of  bromide  of  barium.  If  this  produces  a  whitish  turbidi- 
ty, it  shows  that  there  has  not  been  enough  bromide  of  barium  added, 
and  more  must  be  very  carefully  added,  until  the  sulphate  of  quinia 
is  all  or  nearly  &\\  decomposed.  It  is  better,  of  course,  to  have  a  little 
undecomposed  sulphate  of  quinia  in  the  solution  than  any  bromide  of 
barium. 
When  the  precipitation  of  sulphate  of  baryta  is  completed,  filter 
the  solution,  while  still  warm,  into  a  capsule,  and  evaporate  at  a  gen- 
tle temperature,  until  crystallization  begins  to  set  in.  Then  remove 
from  the  fire  and  set  aside  to  crystallize.  The  bromide  of  quinia  will 
be  found  to  be  aggregated  in  globular  clusters  of  brilliant  silky  nee- 
dles, and  the  singularly  beautiful  appearance  of  the  crystallization  is 
alone  almost  ample  compensation  to  any  ne  for  the  little  trouble  he 
may  go  to  in  making  it. 
Drain  the  crystals  well,  remove  them  from  the  capsule,  and  place 
between  sheets  of  bibulous  paper  and  set  aside  to  dry.  The  crystals 
are  soluble  in  about  40  parts  of  cold  water,  and  appear  to  be  anhy- 
drous. At  least  I  have  had  a  small  quantity  exposed  to  the  air  for  a 
couple  of  weeks,  and  they  do  not  show  the  slightest  appearance  of 
•efflorescence.  I  have  not  made  accurate  weighings,  and  therefore 
cannot  speak  positively. 
Bromides  of  Morphia  and  Strychnia. — These  salts  may  be  prepared 
after  the  same  method  as  bromide  of  quinia,  with  slight  modifications, 
which  will  readily  suggest  themselves  to  the  mind  of  the  operator. 
They  both  crystallize  well,  and  are  quite  as  soluble  as  the  correspond- 
ing sulphates. 
Bromide  of  Calcium. — The  process  of  Mr.  James  R.  Mercein,  in 
the  March  number  of  the  Journal,  is  probably  as  good  a  one  as  could 
be  devised.  The  majority  of  apothecaries,  however,  will  find  the  fol- 
lowing to  be  a  more  ready  and  convenient  way  of  making  it : 
Dissolve  4  oz.  of  bromide  of  ammonium  in  a  pint  of  water.  Put  in 
a  flask  and  bring  to  the  boiling  point.  Keep  boiling,  and  add  milk 
of  lime  (made  from  pure  calcined  lime),  in  small  quantities,  until  am- 
moniacal  vapors  cease  to  be  evolved.  The  operator  can  easily  tell 
when  this  point  has  been  reached,  by  the  sense  of  smell.  Filter  the 
solution,  evaporate  to  a  syrup  consistency,  remove  from  the  fire,  and 
stir  until  cold.    This  salt  is  quite  deliquescent,  and  requires  to  be 
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