238 
A  NEW  SALT  OF  IRON  AND  QUININE. 
sugar  was  formed  under  the  influence  of  the  sulphuric  acid.  The 
total  quantity  of  sugar  (Ci2Hj20^2)  formed  amounts  to  44.99  per 
cent,  of  the  weight  of  the  myronate  of  potash  employed.  The 
myronate,  when  submitted  to  the  action  of  yeast,  yields  no  car- 
bonic acid. 
In  the  aqueous  solution  of  myronate  of  potash,  nitrate  of  silver 
forms,  after  some  time,  a  white  precipitate.  On  boiling,  this  is 
dissolved,  but  a  black  precipitate  of  sulphide  of  silver  soon  forms, 
and  a  strong  odor  of  oil  of  mustard  is  at  the  same  time  manifested. 
The  oil  is  formed  then  under  these  conditions,  without  the  inter- 
vention of  the  myrosine. — London  Pharm.  Journ.  April,  1861, 
from  Amialen  der  Chimie,  Jan, 
A  NEW  SALT  OF  IRON  AND  QUININE. 
(^Commnnicaied  ly  Dr.  Fergus,  of  Marlborough  College,  to  the  Medical  Times 
and  Gazette,  March  17.) 
It  is  generally  found  that  a  salt  of  the  protoxide  of  iron  is  pre- 
ferable to  one  of  a  higher  degree  of  oxygenation  ;  but  it  is  also 
diflBcult  to  obtain  an  absolutely  permanent  salt  of  the  protoxide. 
Perhaps,  without  exception,  the  sulphate  is  the  most  practically 
useful  of  all  the  salts  of  iron,  owing  to  the  uniformity  of  its  com- 
position. Of  the  quinine  salts,  the  sulphate  is  also  the  most 
available  for  general  purposes.  It  is  not  difficult  to  form  a  sim- 
ple combination  of  these  two  sulphates,  but  the  resulting  com- 
pound is  not  well  fitted  for  general  use.  The  addition,  however, 
of  a  certain  proportion  of  sulphate  of  magnesia,  enables  us  to  ob- 
tain a  salt  which  is  nearly  as  soluble  as  the  sulphate  of  magnesia 
itself — quite  unalterable  in  the  solid  state,  and  forming  a  solution 
perfectly  clear  at  first,  and  remaining  so  for  an  indefinite  period. 
The  iron  has  no  tendency  to  a  further  state  of  oxygenation  ;  the 
solution  has  been  agitated  with  oxygen  gas,  and  kept  in  contact 
with  it  for  several  days,  without  the  least  change.  A  solution 
of  gallic  acid  tinges  a  solution  of  the  salt  of  light  bluish  color 
after  the  lapse  of  two  or  three  days,  and  many  substances  which 
produce  an  inky  compound  with  the  salts  of  iron  may  be  mixed 
with  it  without  causing  any  change  of  color. 
The  proportion  of  the  three  sulphates  which  has  been  adopted, 
