Am.  Jour.  Pharm. 
Nov.,  1883. 
Practical  Notes. 
561 
slowly  flow  so  that  in  the  course  of  12  hours  40  parts  of  percolate  is 
obtained.  Pour  three-fourths  to  four-fifths  of  this  upon  the  sugar  con- 
tained in  a  bottle  and  agitate  occasionally  until  no  more  sugar  is  dis- 
solved. Decant  the  clear  syrup  from  the  residuary  sugar,  and  pour  on 
this  the  remainder  of  the  percolate,  agitating  again  as  before,  until  all 
the  sugar  has  dissolved.  Finally  mix  the  two  syrupy  solutions  and 
strain  through  a  No.  80  sieve. 
PKACTICAL  NOTES  FEOM  VARIOUS  SOURCES. 
By  the  Editor. 
Syrup  of  iodide  of  iron. — Percy  Wells  found  that  glycerin  alone 
would  preserve  a  solution  of  ferrous  iodide,  but  on  mixing  it  with 
syrup  the  usual  difficulties  were  met  with.  To  overcome  these,  the 
author  now  adds  about  an  equal  bulk  of  glycerin  to  the  aqueous  solu- 
tion of  the  salt,  heats  to  212°F.,  and  filters  into  the  requisite  quantity 
of  cold  glucose  syrup.  After  stirring  with  an  iron  spatula  the  mix- 
ture will  be  turbid  for  about  an  hour,  but  afterwards  becomes  bright 
and  of  a  very  pale  green  color,  and  remains  unaffected  by  time  or  tem- 
perature.— Phar.  Jour,  and  Trans.,  August  4,  1883,  p.  82. 
Pungency  of  tincture  and  liniment  of  iodine. — That  these  prepara- 
tions, if  made  with  methylated  spirit,  sometimes  develop  considerable 
pungency,  has  been  shown  by  MacEwan  and  by  Gregory,  both 
attributing  this  change  to  the  presence  of  allylalcohol,  which  is  one  of 
the  constituents  of  crude  wood  spirit.  W.  H.  Darling  directs  atten- 
tion to  acetone,  present  in  considerable  quantity  in  crude  wood  spirit, 
as  the  probable  cause  of  this  pungency ;  for  the  halogen  substitution 
products  of  acetone  are  of  an  extremely  irritating  nature,  much  beyond 
the  allyl  compounds  in  this  particular. — Phar.  Jour,  and  Transactions, 
July  14,  1883. — We  have  seen  a  sample  of  decolorized  tincture  of 
iodine  made  with  sodium  hyposulphite  and  ammonia  (formula  of  Phar. 
Germ.  I)  which  had  a  strong  pungent  odor  resembling  that  of  volatile 
oil  of  mustard ;  made  with  a  different  alcohol,  the  pungency  was  not 
developed. 
Perosmic  acid  is  a  new  remedy  employed  by  Prof.  Winiwarter  in 
cancerous  and  scrofulous  swellings.  It  is  used  by  injecting  daily  3 
drops  of  a  one  per  cent,  solution  of  the  acid,  which  treatment  causes  the 
tumor  to  soften  and  decrease  in  size,  the  dead  tissue  is  thrown  off  and 
36 
