40 
SYRUPUS  FERRI  PYROPHOSPHATES. 
vation  yet  goes,  a  very  effective  preparation.  That  first  made 
by  the  writer  was  according  to  the  formulae  of  Prof.  Procter, 
published  in  this  Journal,  and  although  by  no  means  an  elegant 
preparation,  was  still  found  to  be  very  efficient,  and  it  obtained 
a  favor  with  some  practitioners,  which  it  still  retains,  probably 
from  containing  less  citrate  of  ammonia.  The  more  elegant 
syrup  of  the  formula  now  to  be  given  has  been  found  to  repro- 
duce a  tendency  to  diarrhoea  in  rare  cases  of  extreme  suscepti- 
bility of  the  mucous  membrane,  as,  for  instance,  in  late  stages 
of  phthisis  and  other  similar  conditions.  The  dark  colored  and 
turbid  syrup  alluded  to,  from  its  minus  proportion  of  citrate  of 
ammonia,  probably,  does  not  develop  this  tendency  to  the  same 
degree,  but  still  produces  the  prompt  tonic  effect.  Its  use  is, 
however,  now  limited  to  this  small  proportion  of  cases,  and  in 
some  hands  only.  Other  practitioners,  who  observed  this  effect 
in  the  green  syrup,  and  are  not  prejudiced  in  favor  of  the  other, 
use  the  green  in  such  cases  in  combination  with  some  astrin- 
gent. 
Syrupus  Ferri  Pyrophosphates. 
Take  of  Solution  of  Pyrophosphate  of  iron,  twenty  four  parts. 
Syrup,  two  hundred  and  forty  eight  parts. 
Mix  them. 
This  solution  of  pyrophosphate  is  that  which  results  from 
the  first  formula  after  filtration.  It  forms  a  beautiful  trans- 
parent yellowish  green  syrup  without  odor,  and  with  only  just 
sufficient  saline  taste  to  relieve  or  correct  the  flat  insipidity  of 
the  simple  syrup.  It  is  easily  taken  by  the  most  delicate 
stomachs,  and  by  children,  and  has  the  single  disadvantage  of 
being  very  liable  to  mould  upon  the  surface.  From  pretty  ac- 
curate observations  it  seems  to  possess  the  rather  peculiar  prop- 
erty of  being  altogether  inert  or  harmless  in  cases  which  do  not 
respond  to  its  tonic  effect.  The  flavoring  material  used  in  Ro- 
biquet's  original  syrup  is  omitted  in  the  writer's  process  as  being 
injudicious,  because  delicate  stomachs  and  palates  are  clawed  by 
constant  repetition  of  even  the  most  delicate  aroma,  whilst  in 
cases  where  a  flavor  is  required,  it  can  be  added  and  varied  by 
the  prescriber. 
Each  fluid  drachm  of  this  syrup  contains  one  grain  of  anhy- 
