526  American  Pharmaceutical  Association.     { ANOVeOmber,hi907? 
The  resulting  solution  is  clear,  transparent  and  dark  green  in 
color.  It  decomposes  readily  when  exposed  to  air  and  moisture,  and 
should  be  directed  to  be  liberally  diluted  when  administered. 
FIFTY-FIFTH  ANNUAL  MEETING  OF  THE  AMERICAN 
PHARMACEUTICAL  ASSOCIATION. 
By  Florence  Yaple. 
SCIENTIFIC  SECTION. 
{Continued  from  page  498.) 
The  Physical  Constants  of  the  Chemical  Compounds  of  the 
United  States  Pharmacopceia. 
By  Atherton  Seidell. 
The  author  compared  the  constants  given  in  the  United  States 
Pharmacopceia  with  those  given  in  literature,  and  found  that  there 
is  most  variation  in  solubilities.    He  thought  that  in  giving  solubil- 
ity a  statement  should  be  made  of  the  parts  by  weight.    He  also 
said  that  when  constants  are  determined  they  should  be  on  chemi- 
cally pure  substances  rather  than  on  United  States  Pharmacopceia 
pure  substances. 
Professor  Coblentz  remarked  that  the  solubilities  given  in  the 
United  States  Pharmacopceia  are  those  of  the  official  chemicals.  The 
author  then  remarked  that  he  thought  if  the  constants  were  abso- 
lute, they  would  be  helpful  in  determining  the  purity  of  the  sub- 
stances. 
Data  Relating  to  Fluidextracts. 
By  Joseph  Feil. 
The  author  prepared  a  table  showing  eighty  different  fluidextracts, 
with  11  columns  of  figures,  as  follows:  Columns  1,  2,  3,  4  and  5 — 
maximum  alcoholic  strengths  taken  from  the  labels  of  five  manu- 
facturing houses.  Column  6 — percentage  of  alcohol  in  the  official 
menstruum.  Column  7 — average  percentages  of  moisture  in  the 
ground  drug,  determined  at  1050  C.  Column  8 — average  percent- 
ages of  u  extractive,"  some  compiled  and  some  determined.  Col- 
umn 9 — percentages  of  alcohol  remaining  in  the  finished  prep- 
arations, calculated  by  assuming  that  100  grammes  "  extractive " 
measures  60  c.c.  Column  10 — the  average  of  Columns  I  to  5  for 
comparison  with  Column  9.  Column  n — the  difference  between 
Columns  "9  and  10. 
