270  Anahjses  of  Secret  Remedies,  etc.  {^V^ri-Jm^""' 
The  aqueous  solution  of  camphor  is  another  point  at  issue.  It  has 
been  supposed  that  during  cold  weather  camphor  water  drops  part  of 
its  camphor.  However,  this  phenonenon  is  only  apparent.  The 
writer  has  often  been  struck  by  the  extraordinary  solvent  power  of 
very  cold  water  upon  camphor,  so  that  during  the  coldest  winter 
weather  the  cold  water  drawn  fresh  from  the  hydrant,  and  having  a 
very  low  temperature,  always  yielded  the  strongest  camphor  water, 
which,  when  subjected  to  the  warm  temperature  of  the  room,  deposited 
camphor  abundantly  and  in  weighable  quantities,  not  upon  the  glass 
above  the  liquid,  but  floating  in  beautiful  crystals  in  the  liquid  itself ; 
so  much  so  that  the  water  was  often  filtered  again  before  use. 
To  verify  the  above  conclusion,  the  writer  employed  lukewarm 
water.  The  camphor  was  first  finely  triturated  with  the  aid  of  alcohol, 
then  with  the  magnesium  carbonate,  first  rubbed  through  a  coarse  sieve, 
then  with  a  portion  of  the  water,  and  poured  into  a  capacious  bottle  ; 
the  remainder  of  the  water  was  then  gradually  added,  and  the  mix- 
ture violently  shaken  during  the  intervals,  and  finally  filtered.  (This 
is  essentially  the  writer's  manipulation  for  the  aromatic  waters.)  The 
bottle  containing  the  filtrate  was  securely  corked  and  allowed  to  cool. 
After  six  hours  a  very  thin  film  of  crystalline  camphor  had  deposited 
on  the  walls  of  the  bottle  above  the  liquid,  the  latter  containing  no 
visible  trace,  not  even  floating  upon  the  surface.  The  liquid  was  again 
filtered  and  exposed  to  intense  cold  for  a  long  time,  but  no  more  cam- 
phor separated,  although  the  liquid  possessed  the  taste  of  camphor  in 
a  marked  degree.  Therefore,  to  make  camphor  water,  free  from 
separated  camphor,  use  lukewarm  water,  or  use  water  of  the  ordinary 
temperature,  let  it  become  equalized  to  the  temperature  of  the  room, 
and  after  a  repose  of  twenty-four  hours,  filter.  But  to  make  a  super- 
saturated camphor  water,  employ  water  having  a  very  low  tempera- 
ture.—  The  Pharmacist,  April,  1871. 
ANALYSES  OF  SECRET  REMEDIES,  ETC. 
By  Dr.  Ehrhardt. 
Received  for  analysis  from  Dr.  R  1,  Boston,  a  bottle  of  "  Lud- 
wigs'  Anti-Qholera  Acid,  advertised  in  the  Western  States,  and 
sold  at  $  5.00  per  four  ounce  bottle. 
Result :    1  part  concentrated  sulphuric  acid. 
5  parts  wine. 
10  parts  water. 
