406 
ARTIFICIAL  VICHY  WATEK. 
the  preparation  should  appear  in  our  columns  for  the  information 
of  pharmaceutists  who  may  desire  to  make  and  vend  this  artifi- 
cial water. 
According  to  M.  Longchamps,  whose  analysis  was  adopted  by 
Soubeiran,  (Traite'  de  Pharm.,  1847,)  the  natural  Vichy  water 
from  the  Grande-Grille  spring,  the  one  most  usually  drank  by 
visitors,  is  as  follows  : 
Carbonate  of  soda,  crystallized,         13.592  grammes. 
Carbonate  of  lime,  .        .        .  0.356  « 
Carbonate  of  magnesia,    .        .  0.085  " 
Carbonate  of  iron,  .        .  0.004  " 
Sulphate  of  soda,  crystallized,  .  1.061  « 
Water,  ....    1000.000  « 
Reasoning  on  the  probable  play  of  affinities  M.  Soubeiran  con- 
structed the  following  formula  for  preparing  the  water  artificially, 
( Traits',  &c,  page  726,  tome  2d,)  in  which  bicarbonate  of  soda  is 
substituted  for  the  carbonate  and  sulphate  of  magnesia  for  a  part 
of  the  sulphate  of  soda  and  carbonate  of  magnesia,  viz  : — 
Grammes.  Grains. 
Take  of  Bicarbonate  of  soda,.    .    .    8-748   =  135. 
Chloride  of  sodium,  .  .  0-167  «  2-577 
Chi.  of  calcium,  crystallized,  0-775  «  11-961 
Sulphate  of  soda,  0-740      <-  11-421 
Sulphate  of  magnesia,  0-246     «  3-796 
Tartrate  of  iron  and  potassa,  0-009  «  0-138 
Water,  one  litre,  pints  2-113 
Carbonic  acid,  five  litres,  vol.  305  cu.b  in. 
He  directs  the  salts  of  soda  and  the  salt  of  iron  to  be  dissolved 
in  a  part  of  the  water,  the  sulphate  of  magnesia  dissolved  and 
added,  and  lastly  the  chloride  of  calcium  in  the  remainder  of  the 
water,  when  the  mixed  solutions  are  charged  with  the  carbonic 
acid  gas  under  pressure. 
The  formula  I  have  used  is  a  slight  modification  of  that  of 
Soubeiran,  the  variation  being  made  to  get  rid  of  small  fractions, 
and  instead  of  forcing  gas  into  the  solution,  the  salts  are  dis- 
solved in  the  smallest  possible  quantity  of  water,  put  in  the  bottles, 
and  then  these  filled  with  carbonic  acid  water. 
