206  The  Chlorinated  Compounds  of  the  U.  S.  P.  {Am'^;j^&cu  ' 
the  original  properties  of  the  liquid  may  be  recovered,  it  is  accom- 
panied by  a  diminution  of  strength. 
50  c.c.  of  the  solution  were  exposed  to  spontaneous  evaporation 
in  the  laboratory  ;  after  twenty-four  hours  the  liquid  was  found  to 
have  gained  -122  per  cent,  in  strength,  and  after  forty  eight  hours  it 
had  gained  -593  per  cent.  This  would  indicate  that  a  preparation 
deficient  in  strength  might  be  brought  up  to  the  official  standard 
by  carefully  evaporating  some  of  the  solvent,  but  no  experiments  on 
this  subject  were  performed  with  large  quantities. 
The  results  which  were  attained  by  these  investigations  would 
indicate  that  the  process  for  the  preparation  of  solution  of  chlori- 
nated soda  should  be  more  thoroughly  tested  before  the  next 
revision  of  the  Pharmacopoeia. 
The  strength  of  the  market  samples  of  chlorinated  lime,  as 
referred  to  in  the  beginning  of  this  article,  was  also  investigated 
with  the  results  as  tabulated  below. 
Number. 
1 
2 
3 
4 
5 
6 
7 
8 
9 
The  samples  were  procured  from  a  variety  of  trade  sources,  and 
it  is  thought  that  they  fully  represented  the  market  condition  of  the 
substance.  In  1892,  before  the  recognition  of  the  new  standard, 
Dr.  E.  R.  Squibb  examined  eight  market  samples  with  an  average 
of  28-66  per  cent.  (Ephemeris,  page  1330).  The  average  of  the 
above  nine  specimens  was  but  25-20  per  cent.,  but  there  were  several 
samples  which  were  of  scarcely  any  value  whatever,  and  eliminating 
these,  the  average  would  be  fairly  good,  but  not  yet  up  to  the 
standard.    Evidently  the  pasteboard  containers  do  not  preserve  the 
Per  cent,  of 
available  CI. 
Condition. 
35-15 
6  2 
32-68 
dry 
moist 
damp 
2  5 '69 
damp 
32-38 
dry 
32-25 
dry 
14-64 
damp 
9"35 
moist 
38-36 
dry 
Remarks. 
Bulk  stock. 
Pasteboard  box. 
Pasteboard  box. 
Pasteboard  box.    Same  brand 
as  No.  3. 
Pasteboard  box.    Same  brand 
as  Nos.  3  and  4 
Bulk  Stock. 
Pasteboard  box.  Bore  guaran- 
tee of  full  strength. 
Pasteboard  box.  Same  brand 
as  No.  2. 
Bulk  stock. 
