THE  AMERICAN 
JOURNAL  OF  PHARMACY 
JANUARY,  i8q6. 
DISTILLED  WATER.1— f 
J.  U.  Ll,OYD. 
{Continued  from  page  196,  z8qj). 
It  was  found  (see  this  Journal,  1895,  p.  190)  that,  by  means  of 
a  stone  condenser,  ordinary  Ohio  River  water  could  be  employed 
to  make  distilled  water  that  would  stand  the  requirements  of  the 
U.  S.  P.  concerning  organic  matter. 
Inorganic  Matter. — It  was  also  stated  that,  by  means  of  evapora- 
tion in  platinum,  this  water  left  visible  rings  of  inorganic  matter- 
On  determining  the  amount  of  this  matter,  it  was  found  that  100,- 
000  c.c.  left  1-8  gm.  of  residue,  which  proved  to  be  dissolved  stone, 
and  constant.  Tucker2  gives  the  following  limits  of  observed  resi- 
dues with  glass  condensers : 
100,000  parts  of  water  left  from  2-20  to  23-00  parts  of  residue. 
In  this  connection  it  may  be  stated  that  glass,  tin,  stone  and  alumi- 
num condensers  all  leave  residues,  which,  as  Prof.  T.  H.  Norton  is 
investigating  the  subject,  will  not  be  considered  in  detail  here. 
Keeping  Qualities  of  Distilled  Water. — In  this  direction,  the  ques- 
tion presenting  itself  is  as  to  what  length  of  time,  under  ordinary 
shop  conditions,  distilled  water  may  be  kept.  While  it  is  evident 
that  in  securely  sealed  bottles  no  change  can  occur  to  alter  the 
1  The  author  extends  his  thanks  to  Dr.  Sigmond  Waldbott  for  assistance  in 
details  of  this  work. 
2  The  Adulteration  of  Drugs.  A  lecture  delivered  before  the  Department  of 
Chemistry  of  the  Brooklyn  Institute  of  Arts  and  Sciences,  May  24,  1895,  by 
Willis  G.  Tucker. 
(1) 
