FORMULA  FOR  NEW  PREPARATIONS. 
405 
1  part  of  nitrate  of  silver,  6  mucilage  of  gum,  and  6  parts  dis- 
tilled water. — Ibid.,  No.  2,  from  Ohem.  Techn.  ReperL 
Spiritus  Formicarum. — Instead  of  distilling  it  from  ants,  the 
following  formula  is  proposed  in  N.  Jahrb.  f.  Pharm. :  Acid, 
formic,  cone.  Jss,  alcoh.  dil.  (sp.  gr.  -90)  fb.  i.  Hager's  Manual 
directs:  Acid,  formic,  (containing  25  per  cent,  anhydrous lacid) 
4  parts,  aether,  acet.  p.  J,  alcohol.,  sp.  gr.  'SSo,  alcohol.,  sp.  gr. 
•900,  each  8  parts. — Ibid.,  No.  15. 
Remedy  for  Carious  Teeth. — Nitric  ether  and  sulphate  of 
alumina  are  mixed  so  as  to  form  a  paste,  which  is  applied  to  the 
cavity.  It  never  occasions  any  inconvenience,  the  most  violent 
tooth-ache  is  promptly  relieved,  and,  after  several  applications, 
the  affected  tooth  becomes  insensible. — Ibid.,  No.  20,  from  Jour, 
de  Chim.  Med. 
Hydrated  Silicate  of  Magnesia  is  prepared  by  precipitating 
a  warm  dilute  solution  of  Epsom  salt  with  a  solution  of  soluble 
glass,  entirely  free  from  lead,  until  it  ceases  to  produce  a  pre- 
cipitate, which  is  washed  and  dried.  It  forms  a  soft,  light,  taste- 
less powder,  which  has  been  used  with  great  success,  by  Dr.  Gar- 
raud  and  others,  as  a  substitute  for  bismuth  in  epidemic  cholera 
diarrhoea.  Dose,  5  to  10  grammes  with  gum-water. — N.  Jalir- 
buck  f.  Pharm.,  April,  1869,  224,  from  Pharm.  Centr,  Halle, 
1869,  10. 
Solution  of  Acetate  of  Alumina,  which  is  considerably  used 
in  some  parts  of  Germany  as  a  gargle  in  sore  throat,  wash  for 
wounds  and  for  scorbutic  gums,  is,  according  to  Hager,  obtained 
free  from  lead  by  precipitating  a  solution  of  80  parts  sugar  of 
lead  in  240  water,  by  a  solution  of  50  parts  ammonia  alum  and 
10  sulphate  of  soda  in  400  hot  water ;  after  setting  aside  for 
twenty-four  hours  in  a  cool  place,  (5  to  10°  C.,)  the  liquid  por- 
tion is  passed  through  a  filter.  If  a  pure  potassa  alum  is  used, 
its  quantity  must  be  increased  to  about  53  parts.  The  prepara- 
tion is  best  made  in  winter.  It  contains  8  per  cent.  Alfi^^'^Ka, 
and  has,  at  17*5'^  C,  a  specific  gravity  =  1*021  to  1*023. — Ibid.^ 
285,  from  Ibid.,  2. 
lodated  Milk  contains  iodine  so  intimately  combined  that  it 
cannot  be  detected  by  the  taste,  smell,  or  color.    It  was  first 
