ON  THE  IODINE- WATER  OF  DR.  ANDERS.  397 
two  ounces  of  iodine  water,  mentioned  in  experiment  6,  was 
treated  with  two  drachms  of  water,  in  which  it  dissolved  to  a 
slightly  turbid  liquid ;  the  filtered  solution  contained  iodide  of 
potassium. 
The  contents  of  the  retort  from  experiment  b  being  emptied 
into  a  porcelain  dish,  and  slowly  evaporated,  left  a  grayish  sub- 
stance, which  was  soluble  in  alcohol  at  80  per  cent;  the  solution 
was  somewhat  turbid.  The  filtered  spirituous  solution  mixed 
with  some  water,  left  after  evaporating,  three  grains,  which  was 
nothing  else  than  iodide  of  potassium,  that  is,  f  of  a  grain  to 
one  ounce  of  the  iodine  water,  which  is  equal  to  0.5733  of  a 
grain  of  iodine.  The  small  remaining  quantity  insoluble  in 
alcohol,  contained  traces  of  sulphuric  acid,  of  silicic  acid  (silica;, 
of  lime,  and  of  peroxide  of  iron. 
d.  Two  ounces  of  iodine  water  were  treated  with  five  grains  of 
pure  caustic  potassa ;  this  solution  was  evaporated  to  dryness, 
and  mixing  a  little  powdered  charcoal  with  it,  was  slowly  nealeci 
in  a  silver  crucible.  After  cooling,  the  mass  was  treated  with 
water,  the  solution  being  filtered ;  the  contents  of  the  filter, 
well  washed,  was  neutralized  by  very  diluted  sulphuric  acid,  and 
then  decomposed  by  a  solution  of  nitrate  of  palladium.  The 
iodide  of  palladium  obtained  was  edulcorated,  exsiccated,  then 
weighed  2|  grains,  which  is  equal  to  1.69228  grain  of  iodine, 
that  is,  equal  to  0.84614  of  a  grain  of  iodine  to  one  ounce  of 
iodine  water.  If  that  quantity  of  0.5733  of  a  grain  of  iodine, 
combined  with  potassium  in  one  ounce  of  the  iodine  water., 
is  substracted  from  0,84614  of  a  grain,  then  there  follows 
0.27284  of  a  grain  of  free  iodine.  And  if  the  average  will  be 
taken,  between  0.27284  and  0.26934,  accounted  in  experiment, 
b,  to  one  ounce  of  the  iodine  water,  then  there  results  the 
average  of  0.27109. 
According  to  my  analysis,  there  is  found  in  one  ounce  of  the 
iodine  water  0.27109  of  a  grain  of  free  iodine,  (something  more 
than  J  grain),  0.5733  of  a  grain  of  bound  iodine,  forming  with 
0.1779  of  a  grain  of  potassium,  =0.7512  of  a  grain  of  iodide  of 
potassium,  traces  of  sulphuric  acid,  of  silicic  acid  (silica),  of  lime, 
and  of  peroxide  of  iron. 
Tarentum,  Alleghany  Co.,  Pennsylvania* 
