^ptembe/igoT' }  -American  Pharmaceutical  Association.  437 
On  the  Keeping  Qualities  of  Some  U.S. P.  Volumetric 
Solutions. 
By  A.  H.  Clark. 
The  author  has  accumulated  during  the  past  three  years  con- 
siderable data  on  the  keeping  qualities  of  some  standard  volumetric 
solutions,  and  presents  the  facts  just  as  they  developed  in  the  course 
of  regular  work. 
Identification  of  Fluidextracts. 
By  H.  M.  Gordin. 
The  author  considers  the  need  of  introducing  into  the  U.S. P. 
methods  for  the  identification  of  powdered  drugs  and  galenicals. 
While  the  identification  of  fluidextracts  could  be  made  more  complete 
by  determinations  of  more  constants,  e.g.,  amount  of  water  required 
to  produce  permanent  turbidity,  angle  of  refraction,  etc.,  yet  for 
practical  purposes,  however,  a  determination  of  the  specific  gravity, 
of  the  strength  in  alcohol,  and  of  the  amount  of  solid  residue  would 
be  quite  sufficient  for  preventing  the  substitution  of  cheap  sophis- 
ticated methods  for  those  given  in  the  U.S. P. 
I 
Observations  on  Commercial  Tinctures  of  Iodine. 
By  Agnes  Dunning  and  L.  E,  Sayre. 
The  object  of  this  paper  is  to  show  that  on  keeping  tincture  of 
iodine  in  cork-stoppered  bottles  the  concentration  of  the  iodine  is 
progressive.  The  authors'  experiments  further  show  that  the  official 
tincture  of  iodine  can  be  safely  transported  to  the  laboratory  for 
analysis,  and  the  legality  of  such  analysis  should  not  be  questioned, 
because  of  the  cork  stopper.  They  further  show  that  if  the  sample 
on  analysis  indicates  a  deficiency  in  strength,  this  cannot  be  due  to 
the  age  of  the  sample  nor  to  the  cork-stoppered  container.  The 
objection  to  the  glass-stoppered  container  is  too  well  known,  for  a 
preparation  of  this  kind,  to  need  description.  In  Kansas  these  con- 
tainers were  tried,  and  they  proved  very  unsatisfactory.  It  is  almost 
impossible  to  get  a  small  glass-stoppered  bottle,  the  stopper  of  which 
is  sufficiently  well  ground  to  transport  in  it  this  volatile  preparation. 
