^"■Augusri9'2'S: }       U.  5.  Pkarmacopoeial  Revision.  547 
tilling  off  the  Alcohol  and  again  exhausting  the  syrupy  residue  with 
ether.  The  residue  is  dissolved  in  95  per  cent,  alcohol  which  is  again 
distilled  off.  This  method  yields  a  resinoid  tannin  soluble  in  hot 
water  and  capable  of  reacting  with  ferric  salts  and  gelatin  like  other 
tannins.  The  originator  of  this  method  named  the  dye  principle  in 
Henna,  Henna-tannic  Acid. 
BoTANiCAi,  Research  Laboratory, 
PH11.ADELPHIA  College  of  Pharmacy  and  Science. 
SUGGESTIONS  FOR  UNITED  STATES  PHARMACOPOEIAL 
REVISION  SUBMITTED   BY  THE   COMMITTEE  ON 
THE  UNITED  STATES  PHARMACOPOEIA  OF  THE 
PHILADELPHIA  COLLEGE  OF  PHARMACY. 
May,  1920. 
scope  and  general  principles. 
Scope  of  the  Pharmacopoeia. — We  recommend  that  the  limita- 
tions applied  against  the  admission  of  patented  and  proprietary 
preparations  and  medicinal  substances  in  the  U.  S.  P.  IX,  be  con- 
tinued in  the  next  revision. 
The  Diagnostical  Reagents  and  Clinical  Tests. — We  consider  this 
as  extra  pharmacopoeial,  not  being  within  the  scope  of  a  book  of 
standards  for  medicines,  and  the  scope  as  defined  in  the  U.  S.  P. 
IX,  and  therefore  should  be  eliminated  from  the  book. 
Posology. — We  recommend  that  there  be  established  a  special 
sub-committee  on  Posology  of  the  Committee  on  Revision;  further, 
that  in  place  of  the  statement  of  average  doses,  as  shown  in  the 
U.  S.  P.  IX,  there  be  given  a  range  of  commonly  prescribed  doses  for 
adults,  and  that  this  be  accompanied  by  a  statement  that  the  doses 
given  are  to  be  considered  as  advisory  for  the  guidance  of  the  phy- 
sician, not  as  compulsory,  or  restricted  doses. 
In  the  interest  of  uniformity  and  accuracy,  a  standard  dosage 
measure  should  be  described  by  the  U.  S.  P. 
Pharmacopoeia  Titles  for  Synthetic  Chemicals.— recommend 
that  the  Committee  of  Revision  be  given  authority  to  coin  short  and 
euphonious  names  for  synthetic  chemicals,  where  the  chemical 
name  is  too  lengthy  or  unwieldy  for  a  title,  but  that  in  all  such  cases 
the  true  chemical  name  be  given  as  a  synonym. 
