Am.  Jonr.  Pharm. "( 
Aug.,  1881  J 
Syrup  of  Iodide  of  Iron. 
401 
Nothing  at  all  resembling  the  solid  hydrocarbon  mentioned  by  Per- 
sonne  could  be  observed. — Jour.  Chem.  Soc,  May,  1881,  p.  284. 
On  Quereo-tannic  Acid,  the  Principle  of  Oah-bai'h. — J.  Loewe  has 
investigated  the  querco-tannic  acid  of  oak-bark  and  has  found  that  it 
is  not  a  glucoside.  It  occurs  in  the  oak-bark  in  two  forms,  one  easily 
soluble  in  water  and  one  difficultly  soluble.  To  the  first  he  gives  the 
formula  C2sH280i4.H20  and  to  the  second  Q2^2f^i2'  Both  are 
changed  by  the  action  of  dilute  acids  into  the  red  derivative  called 
oak-red,  C^^^-f^u^  while  water  is  eliminated. — Zeit.  Anal.  Chem.,  20, 
p.  208. 
Preliminary  Notice  on  the  Synthesis  of  Methylconine  and  on  the  Con- 
stitution of  Conine. — Michael  and  Gundelach  have  studied  the  reac- 
tions of  paraconine,  which  Schiff  first  prepared  synthetically  from 
butyl  aldehyd  and  alcoholic  ammonia.  They  prepare  it  more  advan- 
tageously from  butylidene  chloride.  The  base  which  they  obtain  by 
the  treatment  of  this  chloride  with  methylamine  they  consider  to  be 
identical  with  the  methyl-conine  which  Von  Planta  and  Kekule 
found  occurring  in  the  hemlock  along  with  conine.  They  hope,  by 
the  distillation  of  the  hydrochlorate  of  this  base  in  a  stream  of  hydro- 
chloric acid  gas,  to  obtain  conine. — Ber.  Chem.  Ges.,  xiv,  p.  1110. 
A.  W.  Hofmann,  in  studying  the  action  of  heat  upon  ammonium 
bases,  has  also  thrown  some  light  upon  the  constitution  of  conine. 
He  considers  that  it  has  two  hydrogen  atoms  more  than  the  formula 
of  Von  Planta  and  Kekule  demands.  Hofmann  gives  it  the  formula 
CgHj^N  or  (C^UJKRN.—Ibid.,  xiv,  pp.  659  and  705. 
STKANGE  RESTORATION  OF  COLOR  IN  SYRUP  OF 
IODIDE  OF  IRON. 
By  George  W.  Hayes. 
About  March  1st,  1881,  the  writer  commenced  a  series  of  experi- 
ments to  determine  a  good  method  of  preserving  from  change  Syr. 
Ferri  lodidi.  In  order  to  accomplish  this  purpose,  the  various  pre- 
servatives that  have  been  from  time  to  time  recommended,  such  as 
sol.  of  hypophosphorous  acid,  hyposulphite  of  sodium,  reduced  iron, 
tartaric  acid,  glycerin,  glucose,  etc.,  were  used.  Sixteen  different 
experiments  were  made,  the  same  quantity  of  syrup  of  iodide  of  iron 
being  made  in  each  case.  The  bottles,  which  were  full,  were  well 
corked,  and  all  placed  exactly  under  the  same  external  conditions,  this 
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