AmFe0b.fiS4.arm'}    Abstracts  from  the  French  Journals.  103 
then  5  or  6  drops  of  a  10  per  cent,  aqueous  solution  of  acetone  and 
followed  by  an  alkaline  hypochlorite,  such  as  the  commercial  solu- 
tion of  chlorinated  potassa,  added  drop  by  drop.  If  an  iodide  is 
present,  even  in  very  slight  proportion,  a  whitish  cloudiness  is 
observed  which  soon  concentrates  to  clear  yellow  granulations  of 
iodoform.  If  the  result  is  to  be  confirmed  microscopically,  a  portion 
of  the  deposit  is  placed  on  a  glass  slide  together  with  one  or  two 
drops  of  the  liquid  or  else  of  water,  covered  with  a  thin  glass  and 
carefully  heated  to  near  the  boiling  point  of  the  liquid.  Upon  cooling, 
the  miscroscope  will  reveal  the  hexagonal  prisms  and  derivative 
forms  of  iodoform.  In  the  case  of  iodate,  this  is  first  reduced  to  the 
state  of  an  iodide,  by  the  addition  of  a  drop  of  sodium  bisulphite  at 
400  B.,  before  applying  the  process. — Jour,  de  Pharm.  et  de  Chun., 
December,  1893,  p.  499. 
Diiodoform  has  been  reported  upon  by  Maquenne  and  Taine  to 
the  November  meeting  of  the  Societe  de  Therapeutique.  They 
regard  it  as  a  definite  carbon  iodide,  having  the  formula  C2I4  and 
being  almost  entirely  destitute  of  odor,  so  long  as  it  is  protected 
from  the  influence  of  light.  It  is  entirely  insoluble  in  water  and  but 
slightly  soluble  in  alcohol  or  ether ;  the  best  solvents  are  chloro- 
form, sulphide  of  carbon,  benzine  and  especially  hot  toluol,  from 
which  it  crystallizes  in  beautiful  yellow  prismatic  needles,  differing 
entirely  from  the  hexagonal  prisms  of  iodoform.  In  the  pure  state 
it  fuses  at  1920,  emitting  abundant  vapors;  by  brisk  heating  it  is 
decomposed  into  carbon  and  iodine.  Diiodoform  is  obtained  by 
treating  acetylene  periodide  by  iodine  in  excess.  It  is  also  formed 
by  the  action  of  aqueous  potassa  and  iodine  on  barium  carbide,  held 
in  suspension  in  benzine  or  chloroform. — Jour,  de  Pharm.  et  de 
Chim.,  December,  1893,  p.  525. 
A  process  for  the  estimation  of  iodine  in  syrup  of  iodide  of  iron  has 
been  formulated  by  Gioachino  Griggi,  based  upon  the  following 
reaction  between  potassium  chlorate  and  protoiodide  of  iron  : 
2FeI2  +  KCIO3  ==  Fe203  +  KC1  +  I4. 
8  gm..of  the  syrup  are  placed  into  a  test  tube,  and  2  cc.  of  a  5  per 
cent,  solution  of  potassium  chlorate  in  distilled  water  added.  Afttr 
heating  the  mixture  until  it  assumes  an  ocherous  red  color,  and 
allowing  it  to  cool,  5  cc.  of  pure  chloroform  are  added,  the  tube  is 
closed,  cautiously  agitated  and  then  allowed  to  rest.    The  iodine 
