294 
Levico  Mineral  Water. 
j  Am.  Jour.  Pharm,. 
t    July  1,1873. 
frequently,  when  I  found  that  six  and  one  half  drachms  of  the  acid! 
were  dissolved,  leaving  one  and  one-half  drachms  undissolved  to  con- 
tain the  impurities,  which  are  less  soluble  than  the  acid.  As  soon  as, 
the  solution  became  clear,  I  carefully  poured  it  off,  placed  it  in  a  hy- 
drometer glass,  and  added,  with  constant  agitation,  finely  powdered 
salt  (previously  purified  by  dissolving  it  in  water,  filtering  the  solu- 
tion, and  evaporating  to  dryness),  until  the  water  was  saturated,  and 
the  acid  arose  to  the  top.  I  then  carefully  removed  the  acid  with  a 
pipette.  Upon  the  addition  of  ammonia  to  this  product,  it  was  very 
readily  dissolved ;  but  it  did  not  give  the  violet  blue  color  until  after- 
standing  about  twelve  hours.  Not  being  satisfied.  Irepurified  it  in  the- 
same  way,  being  careful  not  to  add  as  much  water  as  I  did  at  first. 
The  addition  of  an  equal  volume  of  ammonia  to  this  product  of  re- 
purification  quickly  dissolved  it,  forming  a  perfectly  clear  solution,, 
which  did  not  acquire  the  violet  blue  color  until  after  standing  nearly 
thirty  hours. 
For  want  of  time  I  was  not  able  to  carry  the  purification  by  frac- 
tional distillation,  as  I  should  like  to  have  done ;  still,  I  consider  the 
product  of  republication  very  nearly  pure — much  purer,  at  least,  than 
any  I  could  find  in  the  market. 
Upon  the  addition  of  ammonia  to  this  acid,  as  stated  above,  it  was 
readily  dissolved  ;  while,  upon  Morson's  creasote,  ammonia  had  no- 
effect  whatever,  neither  dissolving  it  nor  giving  it  the  blue  color  that 
it  gave  to  the  common  creasote.  Merck's  creasote  gave  the  same  re- 
sult;  it  as  well  as  other  samples* that  I  have  tried  being  perfectly 
insoluble  in  ammonia. 
The  ammonia  used  in  the  experiments  given  above  was  the  aqua, 
ammonite  fortior  of  the  U.  S.  P.,  sp.  gr.  0*900.  The  aqua  ammo- 
nise  U.  S.  P.,  sp.  gr.  0*960,  would  answer  the  same  purpose,  but  a. 
much  larger  proportion  would  be  required. 
After  the  successful  termination  of  the  experiments  given  above,  I 
have  no  hesitation  in  suggesting  aqua  ammoniae  fortior  as  a  test  ta 
distinguish  between  carbolic  acid  and  creasote ;  and  of  leaving  its. 
value  as  compared  to  other  tests  now  known  to  the  judgment  of  the 
pharmacist  and  chemist. 
LEVICO  MINERAL  WATER. 
In  a  paper  published  in  a  recent  number  of  the  London  Lance^ 
Levico  water  has  been  noticed,  and  the  article  having  apparently  at- 
