^°'sSt.!"i88^^'''"  }    Abstracts  from  the  French  Journals.  449 
Unalterable  Solution  of  Peotiodide  of  Ieon. — The  for- 
mula recommended  by  Nicot  is  :  Sugar,  4  gm. ;  iodine,  5  gm. ;  iron 
reduced  by  hydrogen,  8  gm. ;  distilled  water,  40  gm. ;  pure  glycerin, 
110  gm.  Mix  the  iodine  and  sugar  in  a  porcelain  mortar,  adding  the 
iron  by  degrees.  Heat  gently  in  a  capsule  stirring  with  a  glass 
rod,  and  filter  to  separate  the  excess  of  iron ;  then  add  the  glycerin. 
The  mixture  should  weigh  150  gm.  The  syrup  is  made  by  adding  6 
gm.  of  this  to  100  of  syrup.^ — Bull.  gen.  de  therap.,  July  30,  1888. 
Action  of  Cold  upon  Ferric  Solutions. — M.  Languepin  sub- 
mitted to  cold  a  30  to  100  solution  of  sulphate  of  protoxide  of  iron 
which  had  been  exposed  to  the  light  while  badly  corked,  and  was 
much  oxidized.  The  liquid  consolidated  in  a  greenish- white  mass ; 
upon  thawing  it  had  the  greenish  color  of  protosulphate  of  iron. 
The  ochre-colored  deposit  on  the  inside  of  the  bottle  had  disappeared. 
A  similar  solution  containing  1  to  100  of  tartaric  acid  had  also  turned 
yellow,  but  became  green  under  the  influence  of  cold.  It  is  curious 
that  after  undergoing  this  desoxidation  the  solutions  remained  unaltered 
for  a  long  time.  The  writer  observed  that  in  using  them  (for  photo- 
graphic purposes)  their  strength  was  slightly  impaired. — Bull,  de  la 
Soc.  de  Ph.,  Bordeaux,  June,  1888. 
Sulphuric  Acid  Made  by  a  New  Method. — Carl  Polony  of 
Vienna  gives  the  process  as  follows :  Sulphate  of  lime  in  small  pieces^ 
is  placed  in  a  crucible  and  exposed  for  3  hours  to  a  temperature  vary- 
ing between  600°  and  1500°  C,  and  at  the  same  time  to  a  jet  of  super- 
heated steam,  when  the  sulphate  decomposes,  forming  sulphuric  acid 
and  hydrated  lime.  The  acid  vapors  are  concentrated  by  the  usual 
methods.  According  to  the  Monit.  des  prod,  chim.,  the  sulphates  of 
sodium,  barium  and  strontium  may  be  used  in  the  same  way. — Nouv.. 
Bern.,  Aug.  8,  1888. 
Cay-cay  or  the  Fat  Tree  of  Indo-china  is  described  in  the 
Bull,  de  la  S.  des  etudes  indo-chinois  as  being  plentiful  in  Cochin 
China,  Cambodia  and  Annam,  where  it  attains  a  height  of  40  metres 
and  a  diameter  of  1  m.  20.    Its  fruit  contains  an  oily  almond  which 
^  This  is  considerably  weaker  than  the  sirop  d'iodure  de  fer  of  the  French 
Codex,  1000  gm.  of  which  must  contain  4.10  gm.  iodine.  For  the  same  weight 
of  finished  syrup  the  U.  S.  P.  requires  82.0  gm.  iodine. — Editor  Amer.  Joue. 
Phar. 
