Am.  Jour.  Pharni.| 
Oct.,l8«2.  j 
Ferrated  Albumen. 
485 
the  residue  dried  at  50°C.  Analysis:  Fe  1-488,  CI  2-700,  albumen 
.95-812  =  4-119  Fe2Cl6,  excess  of  iron  as  Fe2(OH)6  0-131. 
3.  On  slowly  evaporating  the  original  ferrated  albumen  solution  the 
liquid  becomes  turbid,  separating  a  thick  jelly,  which  is  soluble  in 
warm  water,  yielding  a  clear  solution  which  is  not  precipitated  by 
boiling.  The  jelly,  well  drained,  pressed  and  thoroughly  dried  over 
sulphuric  acid,  yielded  Fe  0*998,  CI  4-531,  albumen  94-471  =  Fe^Clg 
2-895,  excess  of  CI  2-634.  The  powder  was  completely  soluble  in 
water  and  the  solution  was  not  disturbed  by  boiling  or  by  alkalies;  acids 
caused  a  precipitate  of  albumen,  while  sodium  chloride  and  potassium 
sulphocyanide  pre(?ipitated  ferrated  albumen. 
4.  The  original  ferrated  albumen  solution  was  completely  precipi- 
tated by  a  saturated  solution  of  table  salt ;  the  precipitate  was  collected 
upon  a  filter,  drained,  pressed,  the  press  cake  rapidly  washed  by  agita- 
tion Avith  water  and  decantation,  again  pressed  between  bibulous  paper 
and  dried  over  sulphuric  i^cid.  The  powder  swells  with  water,  and 
dissolves  after  some  time  to  a  solution  which  is  not  disturbed  by  silver 
nitrate,  but  is  precipitated  by  potassium  sulphocyanide;  its  composition 
is  Fe  1-703,  CI  1-680,  albumen  96.617  =  Fe^Cl^  2-563,  excess  of  iron 
as  Fe2(0H)e  1-566. 
5.  The  original  solution  of  ferrated  albumen  w^as  mixed  with  excess 
of  ferric  chloride  and  precipitated  by  table  salt;  treated  as  before,  the 
powder  contained  Fe  1-15,  CI  1*78,  albumen  97*07  =  Fe^Cl^  2-715, 
excess  of  iron  as  Fe2(0H)g  0-41-  It  behaved  to  reagents  like  the  pre- 
ceding. Both  if  left  in  prolonged  contact  with  water,  while  being 
washed,  become  transjiarent,  gelatinous  and  then  dissolve. 
6.  The  original  solution  yields  with  excess  of  ferric  chloride,  on 
standing,  a  precipitate  which,  treated  as  before,  gave  a  powder  contain- 
ing Fe  1-25,  CI  4-48,  albumen  94-27  =  Fe2Cl6  3-627,  excess  of  CI 
2-103. 
7.  Tiie  original  ferrated  albumen  solution  was  dialyzed,  the  water 
being  renewed  until  silver  nitrate  ceased  to  give  a  reaction.  The  con- 
tents of  the  dialyser  had  a  neutral  reaction  and  could  be  readily 
filtered.  The  liquid  was  not  disturbed  by  boiling,  by  alc^ohol,  caustic 
alkalies,  carbonic  acid  gas,  or  silver  nitrate.  It  was  colored  violet-blue 
by  tannin,  and  green,  without  precipitate,  by  ammonium  sulpliydrate. 
Nitric  and  hydrochloric  acid  caused  a  precipitate  of  albumen,  the  solu- 
tion being  yellow;  lime-water  a  brownish-yellow  preci})itate ;  })Otas- 
sium  ferrocyanide  a  bluish-green  precipitate,  turning  dark-blue  on  the 
