AmbJe°cu,r  l8P7h9arm' }        Solution  of  Per  chloride  of  Iron.  585 
To  be  certain  that  with  slowly  increased  doses  I  was  not  gradually 
accustoming  myself  to  the  use  of  it  I  desisted  for  one  week,  and  then 
again  took  it  in  grain  doses  without  finding  bad  effects  from  it.  The 
constant  use  of  it  for  three  weeks  gave  rise  to  no  symptoms  of  an 
accumulative  character.  That,  also,  the  absence  of  any  symptoms  of 
poisoning  in  me  was  not  possibly  due  to  an  individual  immunity  on  my 
part,  I  demonstrated  by  giving  it  in  grain  doses  to  some  of  my  friends, 
who  experienced  no  more  effect  from  it  than  I  did  myself. 
In  summing  up  the  results  so  obtained,  I  do  not  hesitate  to  state  that 
the  artificial  vanillin,  such  as  I  obtained  from  Messrs.  Fritzsche  Bros., 
New  York,  who  are  the  agents  for  the  sale  of  Dr.  J.  W.  Haarmann's 
vanillin  in  this  country  is,  in  doses  in  which  it  is  employed  for  flavoring 
purposes,  certainly  devoid  of  any  toxic  effects  on  the  human  organism; 
that  in  its  physiological  action  it  is  identical  with  the  natural  vanillin  as 
contained  in  the  bean,  and  that  if  above-stated  poisonous  effects  were 
observed  in  persons  eating  cream  puffs  flavored  therewith,  the  poison- 
ous cause  must  be  looked  for  in  other  ingredients  of  the  cream  puffs, 
-or  most  probably  in  the  quantity  of  the  confection  consumed. 
In  conclusion,  I  would  state  that  amongst  the  many  uses  of  artificial 
vanillin  in  pharmacy  I  have  found  it  most  serviceable  in  preparing  the 
*c  Trochisci  Potassii  Chloratis"  of  the  Pharmacopoeia,  which  it  leaves 
beautifully  white  and  of  a  prominent  and  agreeable  taste  of  vanilia;  and 
I  submit  below  the  formula  for  them  as  employed  by  me. 
R     Potassium  chlorate,  .  .  .  .  lbs.  iv 
Powdered  sugar,  ....        lbs.  xvi 
Vanillin,  ....  grs.  xv 
Mucihge  of  acacia  q.  s.  to  make  into  a  mass,  which  is  to  be  divided 
into  lozenges  of  25  grains  each. 
Philadelphia,  November,  1879. 
SOLUTION  OF  PERCHLORIDE  OF  IRON. 
By  Phil.  Hoglan. 
Mr.  E.  B.  Shuttleworth  gives  a  new  mode  of  preparing  this  solution 
in  the  "Journal  "  for  March,  1879,  P-  I4I»  Wli^  tne  recommendation 
that  others  among  your  readers  give  their  experience  on  the  process. 
I  have  made  some  of  the  solution,  in  accordance  with  Mr.  Shuttle- 
worth's  directions,  and  find  the  plan  operates  successfully,  giving  a  solu- 
