Am.  Jour.  Pharm,  1 
April,  1880.  j" 
Albuminate  of  Iron, 
189 
As  before  stated,  the  method  of  determination  is  not  such  as  should 
be  employed  to  secure  that  degree  of  accuracy  that  is  necessary  to 
determine  the  chemical  constitution  of  albuminate  of  iron.  The  results 
are,  however,  sufficiently  accurate  to  show  that  the  compound  obtained 
by  the  method  of  precipitation  is  uniform  in  its  composition,  and  points 
out  very  clearly  that  an  albuminate  of  iron  of  definite  constitution 
exists. 
What  its  precise  constitution  may  be,  however,  is  a  question  which 
I  must  leave  to  others,  who  have  more  time  for  such  investigation,  to 
decide ;  and  I  will  simply  observe  in  this  connection  that,  if  the 
formula  of  albuminate  of  iron  represents  i  molecule  albumen  (C^^^H^g^ 
^13^2^22=^^' 2)  ^  molecule  ferric  chloride  (Fe2Cl3=i62*5),  the 
compound  would  represent  4*5  per  cent,  ferric  oxide;  or,  if  it  represents 
I  molecule  each  of  albumen  and  ferric  oxide  (Fe203=8o),  it  would  con- 
tain 4*728  per  cent,  ferric  oxide. 
The  following  table  shows  the  percentages  of  ferric  oxide  that  have 
been  obtained  or  are  claimed  for  the  different  albuminates  i 
Albuminate. 
Ferric  Oxide. 
Corresponding  to 
Metallic 
Iron. 
Ferric  Chloride. 
If  Fe,Cl3,C,,,H,,,N,3S  ,0,„  . 
4-500 
p.  c. 
3-147 
p  c. 
9-150 
p.  c. 
If  Fe,03,Ci,,H,2,Ni3S,0,,,  . 
4  728 
(C 
3-304 
(( 
9-600 
(( 
Friese's,     .           .           .  . 
3*998 
(( 
2-8oo 
(< 
8-122 
(( 
Blel's, 
4-769 
(( 
3-340 
(( 
9-719 
<c 
Hager's,    .           ,           .  . 
6*500 
<( 
4'55o 
(( 
13-201 
DiehTs,             Exp.  4, 
5-160 
<( 
3*612 
11 
10-479 
u 
Do.    clear,       "    6.  . 
5-190 
« 
3*633 
10-540 
(( 
Do     mixed,     "  6, 
5-170 
(< 
3-619 
t( 
10500 
<( 
Friese's,              "    7?  • 
4-800 
<( 
3-360 
<< 
9'748 
(( 
Bernbeck's,          <'  8, 
4*8oo 
(( 
3-360 
<( 
9-748 
<( 
Finally,  my  observations  may  be  summed  up  as  follows  : 
1.  Albuminate  of  iron,  in  a  dry  condition,  can  be  obtained  with 
great  ease  by  a  method  of  precipitating  its  solutions  with  common 
salt. 
2.  So  obtained,  whether  from  solutions  containing  an  excess  of 
