60 
Sulphovinate  of  Soda. 
f  Am.  Jour,  Pharmu 
X    Feb.  1,1873. 
der,  is  the  most  unreliable  of  these,  generally  becoming  discolored1 
after  being  exposed  to  the  atmosphere  for  a  short  time.  By  the  fol- 
lowing formula  it  can  be  made  so  as  to  be  free  from  this  objection  and 
keep  perfectly  white  : 
Dry  Bicarb.  Soda, 
•  3vij, 
"  Powd.  Sugar, 
5xiijss, 
"  Precip.  Carb.  Lime,  . 
.    grs.  252, 
"  Carb.  Magnesia,  . 
"  64, 
"  Carb.  Iron  Sacch., 
"  60, 
"  Chloride  Sodium, 
oij, 
"  Sulphate  Soda, 
Powd.  Citric  Acid, 
Ex. 
Mix  all  the  articles  well  together ;  powder,  and  pass  several  times 
through  a  No.  60  sieve.  Then  moisten  the  powder  with  f  ^iijss  stronger 
alcohol,  to  render  it  slightly  damp  and  adherent,  and  then  granulate 
through  a  No.  8  sieve.  Dry  the  granules  at  a  temperature  not  ex- 
ceeding 120°  Fah.,  and  sift  through  No.  8  sieve.  Bottle  and  keep  dry.. 
A  sample  of  Vichy  salt  prepared  in  this  manner  remained  perfectly^ 
white  after  being  exposed  for  over  two  months. 
SULPHOVINATE  OF  SODA. 
By  Charles  Rice. 
Having  prepared  this  salt  for  some  time,  and  having  tried  several 
methods  for  obtaining  it,  I  can  recommend  the  following,  as  yielding- 
a  good  product,  at  a  moderate  price  : 
Take  of  alcohol  (sp.  gr.  0-815),  sulphuric  acid  (sp.  gr.  1*830),  each 
64  fl.  oz.  Add  the  acid  to  the  alcohol,  contained  in  a  large  flask,  in 
portions,  at  short  intervals.  At  first,  the  temperature  of  the  mixture 
rapidly  rises  to  212°  F.,  and  violent  ebullition  takes  place  at  each 
successive  addition  of  acid,  but  this  gradually  ceases  as  the  specific 
gravity  of  the  mixture  increases,  and  the  last  portions  of  the  acid 
may  be  added  quite  rapidly.  Cover  it  well,  and  allow  it  to  stand  for 
two  or  three  days.  The  mixture  of  alcohol  and  acid  should  not  be 
raised  to  the  boiling  point,  since  the  yield  of  sulphovinic  acid  is  there- 
by considerably  diminished,  while  that  of  oil  of  wine,  ether,  etc.,  i& 
proportionally  increased.  Pour  the  mixture  slowly,  while  stirring* 
into  five  times  its  bulk  of  water,  and  saturate  the  acid  liquid  with  car- 
bonate of  lime.    Strain  the  liquid,  wash  the  precipitated  sulphate  of 
