494 
British  Pliar.  Conference. 
f  Ain.  Jour.  Phartn. 
\      Ortolirr.  1911. 
Extract  of  Indian  Hkmp. 
By  Harold  Deane. 
The  author  says  that  as  it  is  generally  admitted  that  the  resinous 
portion  of  the  extract  contains  the  active  principle,  and  therefore 
extracts  which  are  practically  pure  resin  may  be  expected  to  be  thera- 
peutically more  active.  The  author  gives  a  simple  and  economical 
method  for  obtaining-  such  an  extract,  which  consists  in  washing 
away  the  brown  extractive  with  warm  water,  after  the'  alcohol  has 
been  distilled  off. 
Note  on  Spirit  of  Sal  Volatile. 
By  E.  W.  Pollard. 
Eor  the  preparation  of  sal  volatile  the  writer  recommends  the 
following : 
Oil  of  nutmeg-    4^  drachms 
Oil  of  lemon    6^  drachms 
Water    2  pints 
Distil  one  pint,  mix  with  six  pints  of  alcohol. 
Dissolve  ammonium  carbonate  4  oz.,  in  strong*  solution  of  am- 
monia 8  oz.,  water  9  oz.,  by  the  aid  of  gentle  heat.  Add  this  solution 
to  the  alcoholic  solution  of  oils.  In  our  opinion  there  is  no  necessity 
for  even  "  gentle  heat." 
A  Suggested  Standard  for  Thyroideum  Siccum. 
By  Reginald  R.  Bennett. 
As  it  is  agreed  among  most  pharmacists  that  the  activity  of  thy- 
roid is  dependent  upon  the  combined  iodine  present  the  author  of 
this  paper  thinks  that  an  iodine  standard  should  be  made  official. 
He  gives  a  method  for  determining  the  iodine  which  is  practically 
the  same  as  Baumann.  He  also  states  that  an  iodine  standard  of  0.15 
per  cent,  could  be  adopted  for  thyrojdeum  siccum  without  in  any 
way  unduly  harassing  the  manufacturer. 
Linimentum  Ammonia. 
By  F.  H.  Alcock. 
The  author  briefly  mentioned  the  various  devices  used  to  prevent 
solidification  caking,  and  partial  separation,  of  linimentum  ammoniae. 
x\s  a  result  of  experiments  made  by  him  he  advises  the  following- 
