AmjJa°^ri8P78arm'}         Solution  of  Dialyzed  Iron.  1 5 
hours,  with  occasional  agitation.  The  mixture  was  then  transferred  to 
a  filter,  and  100  cubic  centimeters  of  the  filtrate  evaporated  to  5  cubic 
centimeters,  and  this  added  to  a  Marsh's  apparatus  of  100  cubic  centi- 
meters capacity,  without  the  slightest  trace  of  arsenic  being  shown  on 
the  application  of  the  test. 
This  experiment  was  repeated  with  like  result,  with  both  Fleitmann's 
and  Marsh's  tests,  without  a  trace  of  arsenic  being  obtained. 
After  the  repeated  unsuccessful  attempts,  to  detect  the  presence  of 
arsenic  in  this  way,  one  drop  of  liquor  arsenii  chloridi  was  added  to 
each  flask  (still  containing  the  filtrates  as  above  described),  and  the 
result  was  immediate,  the  presence  of  arsenic  in  considerable  quantity 
being  instantly  shown  by  the  characteristic  reactions. 
Through  these  experiments,  then,  the  facts  seem  clearly  set  forth, 
(1)  that  dialyzed  iron,  to  be  of  vulue  as  an  arsenical  antidote,  must  be 
first  precipitated  by  the  action  of  some  neutral  salt,  (2)  that  this  pre- 
cipitation, and  the  consequent  production  of  ferric  hydrate,  is  accom- 
plished when  this  preparation  is  taken  into  the  stomach,  and  that,  (3) 
therefore,  the  solution  of  dialyzed  iron  is  a  valuable  antidote  for  arseni- 
cal poisoning,  and  should  be  administered  promptly  in  cases  of  emer- 
gency, followed,  of  course,  by  an  emetic  until  more  efficient  remedies 
can  be  used. 
It,  however,  may  readily  be  conceived  that  an  antidote  may  be  neces- 
sary in  cases  where  the  enfeebled  stomach  of  the  invalid  may  not  be 
able  to  secrete  sufficient  gastric  juice,  even  under  the  direct  stimulus  of 
the  poison,  or  that  the  arsenic  may  be  ingested  into  a  stomach  that  is 
free  from  the  presence  of  any  gastric  secretion.  Now,  while  under 
these  circumstances  the  mucous  secretion  might  prevent  absorption  for 
a  certain  length  of  time,  yet  in  these  cases,  and,  indeed,  we  believe  in 
all  cases,  the  administration  of  solution  of  dialyzed  iron  as  an  antidote 
for  arsenical  poisoning  should  be  immediately  followed  by  a  teaspoon- 
ful  or  more  of  sodium  chloride,  thus  insuring  the  formation  of  ferric 
hydrate  and  the  consequent  neutralization  of  the  poison. 
With  this  addition,  solution  of  dialyzed  iron  is  the  most  convenient 
antidote,  certainly,  to  be  obtained,  and  should  be  kept  in  every  well- 
regulated  pharmacy  for  cases  of  emergency  ;  and  manufacturers  should 
make  the  addition  to  their  labels  directing  the  additional  use  of  this 
salt  (sodium  chloride),  as  through  its  use,  while  no  harm  can  be  done, 
many  valuable  lives  might  be  saved,  which,  through  the  use  of  dialyzed 
iron  alone,  would  possibly  be  sacrificed. 
